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The Citizen Promaster Dive BN0261-51E is a black-dial, stainless-steel Eco-Drive diver with a date display, sapphire crystal and a Citizen-listed 200m water-resistance rating. Its published dimensions are compact for a bracelet diver, but the exact size and price shown vary by region. The specifications below come from Citizen’s product pages, not hands-on wear or dive testing.
What is the Citizen Promaster Dive BN0261-51E?
BN0261-51E is the exact reference for Citizen’s Promaster Marine Eco-Drive model with a black dial, stainless-steel case and bracelet, and date display. Citizen lists several visually related BN026x watches, so check the full reference when comparing or buying; a similar-looking model is not necessarily the same variant.
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Citizen Japan describes the design as an orthodox diver style, with a grooved rotating bezel and a three-link bracelet whose center-link slopes have contrasting polished surfaces. The clasp is described as a ratchet-equipped, double-locking design intended to allow adjustment and fastening over a diving suit. Those are manufacturer descriptions, not independent assessments of how the bracelet or clasp feels or performs in use. Citizen Japan product page.
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How large and heavy is it?
Citizen Japan gives the most detailed dimensions: 40.6mm case width, measured without the crown and crown guard; 11.7mm thickness; 149g weight; and 20mm band width. The regional product pages do not all use the same size or weight figures: Citizen listings show case sizes of 40mm, 40.6mm or a rounded 41mm, and Hong Kong lists 148g. These appear to be regional listing or rounding differences, not a reason to assume every example has a different case.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
For a precise reference point, use Japan’s stated 40.6mm measurement and its stated measurement basis. The figures alone cannot establish how the watch will sit on a particular wrist or how comfortable it will feel.
What movement does it use, and how does charging work?
The watch uses Citizen’s E168 Eco-Drive movement, powered by light. Citizen Japan states that a full charge provides approximately six months of operation under normal use and lists accuracy of ±15 seconds per month. The six-month figure is a manufacturer specification, not a guarantee for every charging pattern or operating condition.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Citizen’s Japanese specification also lists a charging warning, overcharge prevention, quick start and shock detection. These describe built-in functions; they do not establish real-world accuracy or long-term charging performance for an individual watch. Citizen Japan’s specifications.
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Citizen regional pages list 200m water resistance, and Hong Kong identifies the watch as an ISO 6425 diver’s watch. Citizen Japan specifies a one-way rotating bezel and screw-lock crown, along with a sapphire crystal treated with anti-reflective coating. The Japanese specification also lists luminous hands and indices.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
These are the manufacturer’s stated features and designation. They are not independent test results or evidence of this particular watch’s condition after purchase. Water resistance can be affected by wear or damage, so the rating should not be treated as a substitute for checking the watch’s condition and following Citizen’s care guidance.
How does the dial and bracelet look?
Citizen Japan describes the dial as plain and unpatterned, while Citizen Australia calls it gradient black. Without inspecting the actual watch or relying on market-specific official imagery, it is safest to describe the dial as black rather than claim a particular gradient effect.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
The stainless-steel bracelet and contrasting polished slopes on its center links provide more visual detail than a fully uniform finish. Citizen describes the bezel as grooved. These details help distinguish the model’s appearance, but do not establish finishing quality or how the watch looks in person under different lighting.
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Citizen’s regional product pages list different prices. These are local official listings captured in 2026; they are not tax-adjusted comparisons and may differ from current retailer or transaction prices.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
| Market | Citizen-listed price | Warranty information on the cited page |
|---|---|---|
| Japan | ¥81,400 | Three-year international warranty; registration with MY CITIZEN within one year of purchase can extend domestic Japanese coverage to five years |
| Italy | €349 | Warranty terms should be confirmed on the local listing |
| Hong Kong | HK$3,580 | Three years |
| Australia | A$899 | Warranty terms should be confirmed on the local listing |
Sources: Citizen Japan, Citizen Hong Kong, Citizen Italy, and Citizen Australia. The five-year extension described by Citizen Japan is specific to domestic Japanese coverage and registration; do not assume it applies elsewhere. Check the current local Citizen or authorized-retailer listing for price and terms before purchase.
Which Promaster Diver should you choose?
If you are comparing the BN0261-51E with other Promaster divers, start with the exact reference and compare the details that affect your decision rather than relying on the shared family name:
- Appearance: dial color and pattern, case finish, and bracelet or strap.
- Fit: listed case width, thickness, weight and band width, while noting how the regional page defines its measurements.
- Movement: whether light-powered operation and the stated charging characteristics suit your preferences.
- Diver features: the exact model’s water-resistance rating, standard designation, crystal, bezel and crown specifications.
- Local ownership terms: the price and warranty on the page for your market.
For example, Citizen Japan lists BN0264-53E and BN0262-59W at ¥89,100, and BN0260-54L and BN0269-50W at ¥81,400. Those are Japanese listed prices; check each exact variant’s product page for its own specifications rather than assuming it matches BN0261-51E in every respect. Citizen Japan’s BN0261-51E listing.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
