Model BT S200 Standard Bluetooth V2.0( Class II ) Frequency 2.4GHZ~2.48GHz ISM Band Operation Range Up to 10 meters (33 feet) Data Rate 723 kbps Sensitivity -80dBm@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 770mAh OLED Screen Control menu, phone status, battery capacity, call status, caller's ID and phonebook records. Talk Time 6 hours Stand by Time 550 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 centigrade Dimension 77g including battery