Features:- Bluetooth Headset:- Bluetooth 5.0 Intercom - AHR HY-01S Motorcycle Bluetooth Headset support 3 riders to pair & 2 riders to intercom at the same time with speed up to 120 mph & distance up to 1093 yards; FCC, CE, RoHS certificated for safety- CVC Noise Control Technology - Cuts down on background noise to ensure clear sound quality even riding in high speed, reduce acoustic echo and allows for more natural two-way conversation- Multi-functional & Universal - Allows freely answering or dialing the call, rejecting or hanging up the call & auto-receiving calls; Built-in FM radio for listening to the radio while driving, along with music playing function for connecting with MP3smart phone; It can connect with any other brand intercoms, fits for AHR RUN-F, RUN-F3, RUN-M and RUN-M3 full helmetsSpecifications:- Helmet:- Overall Dimension(LxWxH): 14 38" x 10 116" x 10 716"- Size: M- Fits Head Circumference: 22 716" to 22 1316"- Material: ABS, EPS- Net Weight: 3.53 Lbs- Bluetooth Headset:- Overall Dimension(LxWxH): 3 18" x 1 34" x 1"- Charging Cable Length: 37"- Headphone & Audio Cable Length: 22 116"- Phone Connecting Range: 3 14 ft- FM Mode Compatible Frequency: 87 to 108 MHz- Charging Port: Type-C- Material: ABS- Net Weight: 0.66 LbPackage Contents:- 1x Helmet- 1x Carrying Bag- 1x Manual- 1x Bluetooth Headset- 1x Headphone & Microphone- 1x Charging Cable- 1x Allen Key- 1 Set of Clamps- 1 Set of Hook & Loop StickersNotice: - Please measure your head circumference to