Features: Compliant with Bluetooth V1.1, V1.2 Specification Support Bluetooth Headset and Hands free profiles Easily and freely for placement Smart appearance Low radiation Car lighter for power supply Powerful functional echo-clearing circuit High quality of voice communication Voice dialing Lowest power consumption Simply operation LED indicator and tone alert for headset status General Specifications: Frequency Range: 2.4GHz~2.4835GHz unlicensed ISM band Output Power: Less than 4 dBm (class 2) Operation Range: Up to 10m (30 feet) outdoor Security: Pairing, encryption, authentication Input Voltage: 12 ~24 V Voice Performance: Full Duplex ratio: 99%; Noise Suppression ratio: 95%(at talk) Power Consumption: Standby 6 mAh (12V); Active Max 250 mAh (12V) Dimension: 145x56x30 mm