Lambent Ultralight Wireless Bluetooth Y55s Headset - Compatible with iPhone, Android, and Other Smartphones - Black Size name:K1 Bluetooth headset   Mini Wireless Bluetooth 4.0 Stereo In-Ear Headset, can talk, listening to music Built-in DSP audio processing system, can be a very good eliminate Noise and echo, to ensure clear communication, and music. 2 in a row, to the telegraph, voice prompt operation. Small and light, stealth design. Specification: Bluetooth profiles:Hands free / Headset Radio frequency:2.402-2.480GHz Transmission power:Class2 Support A2DP:music playback (audio output: 35mW, Play / Pause) Multi-point connections can be connected to two one with two Bluetooth devices simultaneously Transmission range:10 m Charging Power:AC input 110-240V DC output 5V (charging time / about 2 hours / charging voltage 3.7v) 4 hours talk time (music playback three hours / standby time 120 hours / working current Intelligent voice prompts prompted the state of equipment / to cable Noise MIC: special top silicon Marks Wearing styles: Ear, rechargeable lithium battery back.