Adesso WKB-4000MAC. Device interface: RF Wireless, Keyboard layout: QWERTY. Frequency band: 2.4 GHz, Wireless range: 30.4 m. Keyboard dimensions (WxDxH): 211 x 300 x 25.4 mm, Keyboard weight: 0.499 kg. Battery type: AAA. Certification: FCC, CE, ROHS