Using the latest CSR5.0+EDR Bluetooth technology, superior signal transmission, ultra-low power consumption, all Bluetooth devices, automatic answering function, switchable manual answering phone function, safe and fast, built-in high quality anti-interference microphone It can effectively realize hands-free answering and hang up calls.High fidelity sound , support last song or next song function, volume addition and subtraction, playback pause, automatic callback and other functions, easy to operate.Product parameters:Bluetooth name: A10Bluetooth version: 5.0Transmission distance: 20 metersBattery capacity: 3.7V/2600mAhCharging time: 3-4 hoursMusic duration: about 160 hoursStandby time: about 500 hoursSpeaker size: 40mmSensitivity: 96dbBluetooth protocol: A2DP/AVRCP/HFP/colour: blackMaterial: ABSPackage Contents:1 x Motorcycle Bluetooth Helmet Intercom1 x microphone1 x USB cable2 x mounting clip4 x installation sticker1 x dust cover1 x English manualOnly 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.