Specifications: The bluetooth chip/version: MTK1513 V4.1 + EDR 32 Ω speaker impedance: phi 10 mm + / - 15% Microphones sensitivity: 80 db + - 0.1% Radio frequency is 2.405 GHZ to 2.405 GHZ Battery indicator: rechargeable lithium polymer battery 100 ma Working temperature: - 10-55 ℃ Power supply: DC5V Material: PC + ABS. Supported file formats: A2DP, AVRCP, HSP, HFP Transmission power: CLASS 2 Wireless distance: 10 m Playing time: 6 to 7 hours Charging time: about 2 hours Standby time: 200 hours

• With Advanced bluetooth v4.1, easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devices
• Noise Cancellation technology reduces outside noises, enable clearer sound from microphone, you get high quality, hands-free phone conversation
• Comfortable and secure design fits perfectly to your ear; the cable smartly stays out of your way when running, jogging or exercising
• Compatible with Bluetooth enabled devices such as most PC, PAD,Smart Phone.
• Simple user interface on one of the earphones allows you adjust the volume, play/pause, select songs and answer/hang up calls completely effortlessly

With Advanced bluetooth v4.1, easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devicesRebex