VeeDee MH-03 Motorcycle Bluetooth V4.2 Helmet Headset Wireless Headphone Stereo for Motorbike Scooter (02) Size:02   Wide Compatibility： VeeDee headphone is easy to pair, and is compatible with almost all smart phones and Bluetooth-enabled tablets, such as iPhone, Samsung. Wide Compatibility： Radioddity headphone is easy to pair, and is compatible with almost all smart phones and Bluetooth-enabled tablets, such as iPhone, Samsung. Multi-functions: Radioddity headphone is multi-functions headphone with music playback or pause, automatic call back, increase/decrease volume functions and so on.  Extra-long Working Time:  Its working time is up to 8 hours after fully charged. Besides, its standby time up to 160 hours, you can enjoy the long time using experience with Radioddity headphone. Stable Connection and Clear Speech: Built-in Bluetooth 4.0 and EDR technology, Radioddity headphone is ultra-low power consumption and ensure high-fidelity stereo music. It is in superior signal transmission, strong anti- interference, high sound quality to ensure stable and clear speech. Bluetooth Connection Step: 1.Long press the power button for 2 seconds to turn on the helmet headphones. The Bluetooth is ready to be pair. 2.Turn on the Bluetooth search function on your smartphone, then search MH02 and start to pair with it.  3.Finish the Bluetooth connection. Note: Please check about the size of your helmet before your purchase. Our speaker may not suitable for those compact and tight helmets. Specification: 1.Bluetooth Version: 4.0+EDR 2.Frequency: 2.4026GHz~2.480GHz 3.Transport Distance: 10m(393 inch) 4.Battery: 3.7V/180mAh 5.Charging Time: 1 Hour 6.Standby Time: 160 Hours 7.Working Time: 8 Hours 8.Function: Music, Voice Control, Call 9. Diameter of the speaker: 4.3cm (1.7 inch) 10. Line length: 42cm (17inch) 11. Length from speaker to microphone: 14cm (6inch) 12. Thickness of speaker: 16mm (0.6inch)