Stable Connection: The motorcycle 5.2 intercom headset provides a stable and fast connection, supports 2-6 riders real time communication, has a long communication distance up to 1000m.Handsfree Call: Helmet intercom headset, buily in noise cancellation speaker and microphone, allows you to make handsfree calls, providing a better riding experience.Multiple Functions: The helmet headphone can easily connect to the phones to enjoy music, providing clear and stereo music. And it also supports voice navigation, practical and reliable.Easy to Operate: Waterproof helmet intercom, designed with large function buttons with a reasonable layout, easy to operate, a button answering/hanging up calls, previous/next song, adjusting the volume, etc. Wide Applications: Group helmet communication system, suitable for motorcycle driving, takeout, delivery, outdoor sports, snowboarding, skiing, cycling, snowmobiles, ATV, etc. Specification: Product size: 8cmx5.5cm/3.15inchx2.17inchMaterial: ABS plasticSpeaker diameter: 40MMSpeaker impedance: 32OhmMicrophone sensitivity: -383dbMicrophone impedance: 2.2K version: BT 5.2Working current: