Features: 1) Compliant with Bluetooth V1.2 2) Frequency: 2.4GHz - 2.483GHz 3) Operation range: wirelessly up to 10M (30inches) 4) LED indicating 5) Support voice dialing function / answering calls through single button / refusing incoming calls / hanging up calls 6) Adjustable volume control, matching / encryption / password security certificate 7) Rechargeable Li-polymer battery 8) Faster speed of matching and connection 9) Quicker match and connection, finer sound quality 10) Capable of anti-jamming 11) Charger voltage: 100 - 200V 12) Standby time (max.): 200 hours 13) Talk time (max.): 6 hours 14) Compatible with almost all Bluetooth mobile phones and PCs Inner packing: gift box