eLive KW250LDE. Device interface: RF Wireless, Purpose: tablet, Keyboard form factor: Mini. Frequency band: 2.4 GHz, Wireless range: 10 m. Wireless receiver interface: USB, Receiver type: nano. Keyboard dimensions (WxDxH): 155 x 63 x 12 mm, Keyboard weight: 102 g, Weight: 102 g. Power source type: Battery, Battery technology: Lithium Polymer (LiPo), Battery capacity: 850 mAh