Rapoo H1030. Device interface: RF Wireless, Frequency band: 2.4 GHz, Wireless range: 10 m. Ear coupling: supraaural, Acoustic system: semi-open. Battery life (max): 6 h, Charging time: 2 h. Dimensions (WxDxH): 140 x 51.7 x 173.2 mm. Mac operating systems supported: Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion