1、Long Standby: This motorcycle helmet headset microphone has a built in 180mah lithium ion battery, which can stand by for up to 160 hours on a single charge. 2、Comfortable Ear Pads: The Bluetooth helmet headset has a microphone and supports automatic answering of calls. The thickness of the two ear pads is only 0.27 inches. 3、Bluetooth 5.0: BT 5.0 chip, Hi Fi headset, removable at any time. The thickness of the headset is 0.3 inches, which is basically suitable for all types of motorcycle helmets, and the installation is very simple and quick! 4、Ultra Long Connection Distance: 20~30 meters connection, built in Bluetooth 5.0 is compatible with almost all mobile devices that support Bluetooth. Automatically connect to paired phones within range. 5、Easy to Install: It adopts detachable hook and loop design, easy to install in the helmet, and fixed firmly. Free your hands, allowing you to achieve safe and barrier free calls while riding.