CCYLEZ Keyboard Mouse Combo,Portable Wireless Sensitive Slim Design Silent Adjustable DPI Ergonomic Design USB Receiver Keyboard and Mouse Wireless Keyboard Set,

How to Use: 1. Install the battery 2. Connect the device 3. Start to use Specification: Item Type: Keyboard Mouse Combo Material: ABS Applicable System: Suitable for Win 95, for Win 98, for Win NT, for Win ME, for Win 2000, for Win XP, for Win Vista Working Voltage: 3V Frequency: 2.4G Channel: 16 Engine: Optics Button Life: 5 Million Times Battery: Use Two AAA Batteries for Mouse and Keyboard (Battery Not Included) Package List: 1 x Wireless Mouse1 x Wireless Keyboard 1 x USB Receiver