What you want is to be to answer calls and keep talking without holding your phone while driving. What you want is to be to talk to each other in high definition without lagging or disconnecting Built-in 300 mAh high-capacity battery, providing you with life protection at any time and anywhere Life anti-water precision model design, to prevent rain and sweat into the headset to effectively extend the service life After repeated technical debugging by electronic engineers to achieve barrier-free signal up to 10 meters, no longer worry about the use of headset lag Intelligent compatibility, voice prompts compatible with 99% of the smart phones and digital devices with Bluetooth function Product: Bluetooth headset Bluetooth protocol: 5.0 Charging time: about 2 hours Battery capacity: 300mAh Sound channel: mono Usage: earbud type Functions: volume adjustment, call transfer function up and down song switching, music playback pause, high-definition sound quality Colour:Black+silver Material:ABS Size:6.1 x 1.8cm Package Contents: 1 x Bluetooth headset 1 x Charging cable 1 x Charging compartment Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.