Features: 1. Wireless bluetooth headset， no cords tangling 2. Lightweight and portable， easy to install 3. Available to various kinds of helmets 4. Bluetooth standard: V3.0 + EDR 5. DSP noise-canceling feature 6. Up to 6 hours talking timeSpecification: 1. Size: 285*85*40mm 2. Weight:0.094kg 3. Material: ABS plastic 4. Charging time: about 2 hoursPackage contents1x Bluetooth headset1x Charging cable 1x User Manual