FeaturesBluetooth connectivityBattery life: up to 12 months (keyboard) / up to 30 days (mouse)USB rechargeable laser mouse9 buttonsUp to 3200 DPIThis elegant Rapoo 9900M Advanced Multi-Mode Bluetooth Ultra-Slim Keyboard & Mouse Set looks great on any desk thanks to its stylish, slim design. The keyboard impresses with its ultra-slim, yet robust 4.0 mm design and its casing made of anodised aluminium. The Fn multimedia buttons provide quick access to all major multimedia functions. The combo set 9900M also features an advanced wireless mouse that offers superior comfort and first-class functionality. Thanks to the powerful laser engine with fully adjustable 3200 DPI, precise navigation is possible on almost any surface. The 9900M impresses not only in terms of design and functions, but also in terms of connectivity. The desk set sends via Rapoo\'s latest wireless multi-mode connection - using a reliable 2.4GHz wireless transmission, Bluetooth 3.0 or Bluetooth 4.0 (smart) - and allows you to connect and switch between multiple devices at the same time (automatic pairing). This set has a rechargeable battery, so you can enjoy wireless freedom without having to change batteries.