Mede8er MEDX2KEY. Device interface: RF Wireless, Keyboard form factor: Mini. Frequency band: 2.4 GHz, Wireless range: 10 m. Wireless receiver interface: USB. Keyboard dimensions (WxDxH): 150 x 60 x 12 mm, Keyboard weight: 120 g. Battery technology: Lithium Polymer (LiPo)