... Faster connecting, clear sound, and anti-interference Frequency: 2.4GHz Bluetooth range: 10m SNR ≥ 90 db Support Windows98/win2000 ... OS X Speakers: 2*10mW Support TF card capacity: 128MB-8GB Bluetooth protocol: V2.1 + EDR Bluetooth Standby time: up ... 7 hours By CE,Rohs approved Accessories: Manual, Speaker Cable,USB Charging Cable, Adapter,Microphone(Optional)Certificate: 2012 new bluetooth headsets