... activated voice dialing 4.last number re-dial UTEL T12S Stereo wireless Bluetooth headset surpass the tradition.It is compact,small and ... V1.1, 1.2, 2.0 CompliantCPU: CSR BC3-Audio Wireless frequency: 2402MHZ-2481MHZTransmitted power: Class 2(MAX 4dBm)Received Sensitivity ... , 140mAhCharging time: about 150 minutesTalking time: continue 5 hours, stereo music 4 hoursStandby time: 75 hoursRange: 10 meters