Model BT S110 Standard Bluetooth V1.2( Class II ) Frequency 2.4GHZ~2.48GHz ISM Band Operation Range Up to 10 meters (33 feet) Data Rate 723 kbps Sensitivity -80dBm per 0.1%BER RF TX Power 0 dBm Connectivity Point to point Audio Codec 15 bits resolution,S/N>60DB Audio Encryption 128bits Battery Rechargeable Li-ion polymer 900mAh Low Battery Warning Warning Beep & LED Talk Time 10 hours Stand by Time 900 hours Charger 5V DC, 110 - 240V AC adapter with 4-Pin miniUSB Interface, or 12/24V Car Charger Charge Interface 4-pin mini USB Storage Temperature -40-85 degree Dimension 56g including battery Certifications BQB, FCC, CE