* Bluetooth Specification v2.0+EDR class 2 * RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band * Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm * Supports Bluetooth Headset and Hands-free profiles * Speaker volume gain control * 1 Button design: MFB, * LED Indicator Status: Blue, Red * Rechargeable 60mAh Li-Polymer Battery * 4Pin A type USB plug, can be directly inserted into the PC USB PORT charge * Charger adapter Output: DC 5V&200mA * Nominal charging time: Max 1.5 hours * Talk time: Up to 3 hours * Standby time: Up to 50 hours * Dimensions (main body): 49.3(L) x15.8 (W) x 4(H) mm * Operating Temperature: -10 oC - 50oC * Storage Temperature: -20 oC - 80oC