UGREEN Wireless Chocolate Membrane Keyboard — KU004

The UGREEN Wireless Chocolate Membrane Keyboard is a full-size 104-key wireless keyboard designed for everyday office and home computing. Its chocolate-style keycap profile features raised, rounded cap edges with a slightly concave typing surface. This design sits between the flat chiclet keys of an ultra-slim keyboard and the taller profile of a traditional desktop keyboard. It gives the KU004 a distinctive look while retaining the soft, low-noise keystroke typical of membrane switches. The keyboard connects via 2.4 GHz wireless and runs on a single AA battery for up to 12 months, making it a low-maintenance choice for stationary desk setups.

Chocolate Keycap Design and Typing Feel

The “chocolate” keycap profile refers specifically to the key shape. Each cap has a slightly elevated, rounded edge and a gently concave top surface. This design, consequently, improves tactile registration on each keystroke compared to completely flat keycaps. It also reduces the likelihood of accidental key misses at the edges during fast typing. The membrane switches beneath each key use a rubber dome actuation mechanism. This provides a soft, cushioned press without the sharp tactile bump of mechanical switches. As a result, the KU004 operates quietly — suitable for shared offices, home environments, and any setting where keyboard noise would otherwise be intrusive.

All keycap legends are UV-coated to resist fading under sustained use. Furthermore, this UV treatment preserves legibility on high-frequency keys such as the spacebar, A, E, S, and T over years of daily contact. Fading on these keys is a common failure point on uncoated membrane keyboards. Each key is rated for up to 10 million presses, providing a long service life under typical office workloads.

Full-Size Layout with Number Pad and LED Indicators

The KU004 uses a full-size 104-key ANSI layout. This includes the complete alphanumeric block, a dedicated function row, arrow keys, a navigation cluster, and a full numeric keypad. This layout is therefore well suited to data-entry work, accounting, spreadsheet navigation, and any workflow where a numpad is used regularly. Users who switch between a numpad-equipped keyboard and a compact layout often find the full-size format reduces input errors during numerical entry.

Three LED lock indicators — NUM Lock, CAPS Lock, and Scroll Lock — are visible at the top right of the keyboard. These provide at-a-glance confirmation of active modes. Additionally, the function row doubles as an FN multimedia layer. This gives shortcut access to volume up, volume down, mute, play/pause, stop, track forward/back, homepage, mailbox, My Computer, and Favourites — all without a mouse or secondary application. The FN layer is particularly useful during document work or media playback where quick input adjustments are needed mid-task.

Wireless Connection and Battery Life

The KU004 connects exclusively via a 2.4 GHz USB nano-receiver with a transmission range of up to 10 metres. Unlike the UGREEN Ultra Slim Wireless Keyboard KU005, which supports Bluetooth multi-device pairing, the KU004 is designed for single-device, single-workstation use. This 2.4 GHz-only approach, however, delivers a highly stable, low-latency connection. It is also less susceptible to the interference that can affect Bluetooth in dense wireless environments such as open-plan offices. The receiver stores inside the keyboard when not in use, preventing loss during transport.

Power comes from a single 1.5 V AA alkaline battery, not included. An energy-saving chip combined with an auto-sleep mode extends battery life to approximately 12 months under typical use. A battery and NUM Lock indicator flashes to signal low battery, giving advance warning before the keyboard powers off. This AA-based approach keeps maintenance simple. Moreover, a replacement battery is available from any convenience store, making this a practical choice for users who prefer not to manage charging schedules.

Key Features & Benefits

• Chocolate-Profile Membrane Keys: The raised, concave keycap shape guides the fingertip to the centre of each key, improving keystroke accuracy and providing a soft, quiet actuation suited to sustained typing in shared environments.
• UV-Coated Legends, 10 Million Keystroke Rating: UV coating prevents legend fading on high-contact keys over years of daily use, and the 10 million press lifecycle covers well over a decade of standard office typing.
• Full-Size 104-Key Layout with Number Pad: The complete ANSI layout — including numeric keypad, navigation cluster, and arrow keys — supports data entry, spreadsheet work, and general office tasks without compromising key availability.
• FN Multimedia Shortcuts and Lock Indicators: The FN layer provides one-key access to media controls, volume, and system shortcuts, while NUM, CAPS, and Scroll Lock LEDs give instant at-a-glance mode confirmation.
• ~12-Month AA Battery Life with 2.4 GHz Stability: A single AA alkaline battery powers the keyboard for approximately 12 months with auto-sleep, and the 2.4 GHz USB nano-receiver delivers a stable, low-latency connection up to 10 metres.

Technical Specifications

Source: FCC-registered user manual (2AQI5-KU004 / P/N 90205), Aiconic Computers Kenya, Hurtel, and UGREEN Pakistan verified reseller listings.

Use Cases

Office and Data Entry Professionals

The KU004 is particularly well suited to desk-based professionals who work primarily with a single workstation. Data entry operators, accountants, and administrative staff benefit from the full numeric keypad. It reduces input time on numerical tasks compared to a tenkeyless layout. Furthermore, the FN multimedia layer reduces the need to navigate away from the keyboard for common system controls. This is useful during document review sessions where volume and playback adjustments are frequent. The stable 2.4 GHz connection additionally ensures no perceptible input lag during sustained typing.

Shared Office and Quiet Environments

The rubber dome membrane switches keep the KU004 noticeably quieter than mechanical keyboards. This makes it appropriate for open-plan offices, library workstations, and shared environments where keystroke noise would distract nearby colleagues. Moreover, the 12-month battery life removes the concern of the keyboard running flat mid-session. The plug-and-play 2.4 GHz receiver means the keyboard can be deployed on any compatible machine without driver installation or IT support.

Home and Student Users

Students and home users who need a full-size keyboard for document preparation, online study, or general browsing benefit from the KU004’s complete layout. The AA battery format means replacement is straightforward and inexpensive. Additionally, the chocolate keycap profile provides a more tactile typing experience than flat chiclet keyboards. Many users find this preferable during extended writing or coding sessions. The 416 × 116 mm footprint fits neatly on standard student desks without occupying excessive surface area.

Comparison with the KU005 Ultra Slim Keyboard

Users deciding between the KU004 and the UGREEN Ultra Slim Wireless Keyboard KU005 should consider several key differences. The KU004 offers a full numeric keypad, longer battery life (12 months vs. 3 months), and a traditional full-size layout. However, it connects to only one device and has no Bluetooth. The KU005, by contrast, supports four-device Bluetooth switching and USB-C charging. It also has an ultra-slim aluminium profile but omits the numpad and uses a 99-key layout. Consequently, the KU004 suits fixed single-workstation setups where the numpad and battery longevity are priorities. The KU005 is the stronger choice for multi-device professionals and portable use.