Lambent Bluetooth Earphone Headset with Retractable Earphone Design, Handsfree for Redmi, iPhone and Other Smartphones Colour:HBS730 Black   Product Description  Unique ring-necked design, opening up a new era of Bluetooth, Ultralight elastic memory material, easy to carry, Vibrate to remind you not to miss any incoming calls, High-fidelity stereo audio earphones enjoy entertainment, Intelligent noise reduction, clearer calls, Long standby, long call. Compatible with standard Bluetooth-enabled mobile phone, media devices. Answer/end/reject a call. Last number redial, voice dialing, transfer a call, call waiting.  Features: 1. Pick up that is connected, put down that hang 2. Driving the call, pick up the headset is automatically answered, the headset back into the car charger base, that is automatically hang up 3. A headset can be connected with two mobile phones at the same time, any phone call can pick up that is connected, no additional operation 4. Built-in B magnetic head magnet head, into the base after theB adsorption, pick up and down are quick and easy   Specification:  *Support Bluetooth V3.0, Bluetooth A2DP and call.  *Keys: Key(NEXT),Key(PREV), Switch, Multi-function Key.  *Charging voltage: Micro USB 5V  *Working current: 25-35mA  *Bluetooth A2DP Working range: 10m  *Output power: 2x20mW  *Frequency range: 2.401-2.480GHz  *Distortion factor: ≤1%  *Frequency response: 20Hz-20KHz  *SNR: S/N≥95  *Frequency Response: 20 ~ 20000Hz  *Sensitivity: 80dB  *Impedance: 32 ohms  *Speaker Power: 2 x 18mW # 2 Year Replacement Warranty on Manufacture Defect #