Brand Measy Model RC13 Quantity 1 Color Black Material Frosted material Key Number 83 Connection Method Wireless Power Supply Built-in rechargeable batetry Battery Capacity 800mAh OS System WindowsXP / Vista / 7 / MAC / Linux / Android Other Features Charging time: 4h; Standby time: 30 days; Energy saving and environmental friendly; Grab this in hand instead of putting on desk you can control the computer comfortable and convenient; You also can control computer and TV no matter you are lying or standing; Audio transmission can be achieved only by link USB adapter to USB interface; Also you can talking to your friend on skype w/ Android player or computer; Key lifetime: 1500000 times; Working current; 20mA; Transmission mode: 2.4GRF Packing List 1 x Keyboard 1 x USB receiver 1 x USB charging cable (20cm) 1 x Battery 1 x English user manual