Feature: with the use of Mini Wireless Bluetooth 4. 0 Stereo In-Ear Headset, we can talk, listening to music Built-in DSP audio processing system, can be effective 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 version: V4. 0 + EDR 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 <15mA) Intelligent voice prompts prompted the state of equipment / to cable Noise MIC: special top silicon Marks Wearing styles:Ear / Stealth headphones.