Adesso mini 1000. Device interface: Bluetooth, Purpose: iPad, Recommended usage: Home. Bluetooth version: 3.0, Wireless range: 10 m. Keyboard dimensions (WxDxH): 240 x 120 x 6 mm, Keyboard weight: 255 g. Power source type: Battery, Battery technology: Lithium Polymer (LiPo), Battery life (max): 100 h