Overview

The UGREEN K551 is a compact wireless keyboard with a 78-key Japanese layout, supporting both Bluetooth 5.3 and 2.4G wireless connections. It is designed for users who switch between multiple devices, allowing up to three paired devices to be toggled with a simple button press. The scissor-switch mechanism delivers a light, consistent keystroke whether you press the center or the edge of a key.
Measuring roughly 279 mm long, 119 mm wide, and 7.4 mm tall, the K551 fits easily into tight desk setups. A built-in stand provides about 10 degrees of tilt to reduce strain on the hands and wrists, while the widened area around the space bar gives the thumbs more freedom of movement. This is a practical choice for everyday typing across PCs, tablets, and phones.

Connectivity & Compatibility

The K551 offers two wireless connection methods: Bluetooth 5.3 and 2.4G. Bluetooth works with a wide range of devices, while the 2.4G connection provides a stable link via a dedicated receiver. The keyboard automatically detects the connected OS and switches to the appropriate input mode, supporting Windows, macOS, ChromeOS, iOS/iPadOS, and Android.
Up to three devices can be paired and switched instantly using the dedicated button. This makes it easy to move between a desktop PC, a laptop, and a smartphone or tablet without re-pairing. The Japanese layout with 78 keys covers standard typing needs, including kana input.

Product Info

The K551 was released on March 11, 2025, by Ugreen Group Limited. It sits in the entry-to-mid tier of the wireless keyboard market, offering a straightforward, no-frills typing experience rather than gaming-oriented features. Its compact size and multi-device support make it a sensible option for everyday productivity.

Best Use Cases

  • Office workers who alternate between a desktop and a laptop: the dual wireless modes and three-device pairing keep both machines usable with one keyboard. Not suited for gaming or macro-heavy workflows.
  • Tablet and smartphone users who type frequently: switching between mobile devices and a PC is quick, and the compact size travels well. Those who need a numpad will find the 78-key layout limiting.
  • Minimalist desk setups: the small footprint leaves room for a mouse and other peripherals. Heavy typists who prefer a full-size layout with dedicated arrow keys may want to look elsewhere.

Product Disclosure (Amazon)

  • Manufacturer: Ugreen Group Limited
  • Brand: UGREEN
  • Model: K551
  • ASIN: B0F13FBX29
  • Note: This article covers a manufacturer-made product based on Amazon listing details.