Adaptable and robust the CHERRY B. UNLIMITED 3. 0, with its high-quality Ni MH batteries and interference-free wireless 2. 4 GHz technology with AES encryption, is designed for continuous professional use. Durable key lettering USB cable charging function for both keyboard & mouse even when in use Designed for continuous usage - over 20 mill. confirmations per key High-quality, pre-charged Ni MH batteries from GP with a very low self-discharge Almost interference-free wireless 2. 4 GHz technology (range of up to 10 metres) Data transmission using 128-bit encryption, complying to Advanced Encryption Standard (AES) Multi-station capability operation of several wireless products in one room 3-button mouse: infrared sensor and adjustable resolution (1, 000/2, 000 dpi) with ergonomic side panels Easy to install, requiring no technical knowledge Keyboard awarded the Blauer Engel environmental seal