• Driver unit: 40mm diameter • Support wireless version 4.2 downward • Compatible with version 4.2 • Working range: 10 meters • USB charging cable: Input AC 110~240V DC 5V • Talk time: 6 hours • Standby time: Up to 15 hours • Operating frequency: 2.4GHz ~ 2.4835GHz • Output frequency: class2 • Noise reduction chnology: PS digital signal processor • Support A2DP function • AVRCP remote control capabilities • Supports automatic switching to incoming call function • With function End number redial • Large and small size announcement • Forward-backward selections feature Pause function • ROHS compliant