Features: Bluetooth 5.0 scheme, stable model Support waterproof; The headset compartment has a built-in lithium battery, which supports. charging the headset; Touch key, a fashionable collar, easy to use Independent noise reduction, wireless stereo, good sound quality; Multiple devices are compatible and widely used; Intelligent pairing, automatic pairing after power on, putting earphones into the charging box, and intelligent disconnection for charging; A large capacity 300mAh battery is built in the charging bin to charge the headset more times; Ergonomic design, comfortable to wear. Note: Please allow 1-3mm differences due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Specification: Chipset: JL6936D Support protocol: HSP, HFP, HPP, A2DP, AVRCP, CVC Bluetooth version: V5.