Product Description
1. This headset is our self-designed and developed earphone with 4 patents-two invention patents, one utility model patent and one designing appearance patent
2. Material: ABS material, hardware, PCB board, and other special materials
3. Type: Bluetooth headset with automatic contraction microphone
4. Switch quickly from music to cellphone calls
5. Automatic stretch and contraction function mini microphone: when you are calling, it sticks out automatically, while, at the end of the call it will shrink back automatically
6. Headphone could shutdown automatically if it's opened and not connected to any devices lasts for 15 minutes
7. Bluetooth music playing and calling function

Product Specification/Models
Power source: rechargeable lithium battery, 800mAh
Wireless: Bluetooth 4.0 compliant
Working distance: 10m
Charging time: 2.0 hours
Playback time: 20 hours
With LED light on playback time: 15 hours
Call duration: 18 hours
Impedance: 18 Ohms
Frequency response range: 20Hz-18kHz
Net weight: 320g
Speaker unit: 50mm
MIC: -62dB
Dimensions: 180 * 130mm
Colors: black, white, red, green, blue