Features of BT313 stereo Bluetooth headset:1. With wireless music and call functions2. Super noise reduction function, improve the sound quality by a hundred times;3. This headset can be used universally as long as it has Bluetooth function;4. Light and portable, in-ear type, no matter if it is outdoor travel enthusiasts, sports lovers, drivers, office and other essential Bluetooth headsets.5. Super noise reduction DSP 4.1 Bluetooth version, clear call sound quality and beautiful music sound quality, show off outstanding.6. One support and two functions7. Voice prompt for switching between Chinese and English8. Caller IDProduct parameters:• Bluetooth version V4.1+EDR• Wireless frequency 2.402-2.480GHz• Transmission power Class2• Support A2DP music playback (audio output: 35mW, play/pause)• Multi-point connection One for two can connect two Bluetooth devices at the same time• Transmission range 10 meters• Charging power supply AC input 110-240V DC output 5V (charging time/about 1 hour/charging voltage 3.7v)• Talk time 6 hours (music playback 5 hours / standby time 120 hours / working current