Trekstor 14305. Device interface: Bluetooth, Purpose: iPad, Recommended usage: Office. Bluetooth version: 2.0+EDR. Keyboard dimensions (WxDxH): 248 x 14 x 194 mm, Keyboard weight: 350 g. Power source type: USB, Battery technology: Lithium-Ion (Li-Ion), Current consumption: 510 mA. Cables included: USB