Reference Title: Motorcycle Helmet Bluetooth-compatible Wireless Intercom Headset Earphone Headphone Speaker Handsfree For MP3 MP4 Smartphone Description: Features: . 1. Wirelessly listen to to music with integrated Bluetooth-compatible technology. 3. Hands free function, truly free your hand. 4. Set-in rechargeable Li-ion battery, long stand-by and working for time. 5. 4.0 type of CSR Bluetooth-compatible chip, Hi-Fi earphone. 6. Support power displaying on for iPhone, easy to know when will to be charged. 8. Sound reminderr function, easy to set the device according to sound remind. Specifications: Material: Plastic Color: Black Charging cabke length: 80cm/31.50in (Approx.) Bluetooth-compatible version: V4.0 + EDR Frequency range: 2.4026GHz-2.480GHz Transmission distance: 10M (transmission distance due to environmental factors and mobile phone Bluetooth-compatible devices are different) MIC distance: 1 meter Lithium battery: 3.7V / 150mA Charging voltage: 5V Charging time: 1 hour Standby time: about 160 hours Continuous working hours: about 8 hours Bluetooth-compatible name: Music Hat Quantity: 1 Set (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 X Helmet Bluetooth-compatible Headset (No retail package) 1 X Micro USB Charging Cable 1 X User Manual