Function 1. Newest Bluetooth version:V4. 2+EDR 2. Operating frequency range: ISM (2.4-2.48GHZ)Bluetooth connecting within 10 metersIncoming Call Number Readout 3. Support Hands-Free, Headset, AVRCP Bluetooth agreement standard. 4. Support connecting two mobiles at the same time(choosable), max keep a record 8 mobiles. 5. Build-in DSP noise suppression and echo cancellation function. 6. Equip with HI-FI 2W loudspeaker, high sensitivitymicrophone. Specifications 1. Talk time up to 10 hours/Standby time up to 500 HCharging time approximately 2 H 2. Digital sound enhancement via DSP technology Noise cancellation through DSP Echo cancellation through DSP 3. A2DP (Advanced Audio Distribution Profile) fortransmitting music, pod casts and directions froma GPS app on your phone. 4. SP09 Status Light(ready-to-pair, call status, connection status). 5. Size: H100 x W60 x D21 mm Weight 57 grams 6. Operating range up to1O meters (approximately 33 feet)Supported 7. Bluetooth profiles: HFP, HSP, A2DP 8. Bluetooth specification version 4.2+EDR 9. Build-in digital amplifier for enhanced audio quality 10. Rechargeable battery with charging option from carcharger or USB cable