Bluetooth Profiles:Headset, Handsfree, TTS
Intergrated phonebook:Up to 300 contacts
Working range:Up to 10m
Transmission power:Class 2
Talk Time:Up to 20hours
Standby Time:Up to 500hours
Operating Temperature: -5 C to +55 C
Operating Humidity: 5 - 90%
Radio Frequency:2.401-2.483GHz
Battery:890mA Rechargeable Li-polymer
1.Mute button supports mute function;
2.TTS function, language choice(english/chinese);
3.Access 300 numbers with english name from cell phone;
4.BL-5B battery.