Main Function:1.Support 3 Headsets PairedTwo by Two switch; distance up to 1200m2.Bluetooth connection phone telephone music function and other operations.3.Switch between music intercom and phone functions.4.DSP noise reduction function echo cancellation and noise suppression.5.Waterproof rating: IP676.Built-in FM radio function.7.Support pairing with other brand Bluetooth intercom (SENA CARDO china brand too) and normal mobile bluetooth headset.8.Support connecting ordinary radio PTT control intercom; and a mixing function.9.Press the key to enter the factory self- mode you can function on the key detection.10.Support software upgrade easy to customizeTechlogy Features:1. Operation range: up to 10M2. Bluetooth : Newest 5.1v Quacomm CSR set3. Transmission range(Hz): 2.4 GHz4. Sensitivity: -83dBm5. Built-in 3.7V 800mA lithium battery inform the power low power notice.6. Standby time: 400 hours7. Talking time: 22 hours8. Charge time: 2.5 hours9. Profile support: A2DP + EDR10. Support Dual Micophone CVC noise cancelling11. Support Siri: yes12. Waterproof IP: 6713. Working temperature: -2045 15. Main material: ABS + PC16. Dimensions: 90*45*20mm18. Weight: 55g19. Certification: CR ROHS Maximum Number of Speakers:2 Maximum Intercom Distance:>1000m Certification:CE,RoHS Origin:Mainland China Item Type:Helmet Headset Item Weight:55g External Testing Certification:ce Applicable Helmet Type:Half Helmet,MODULAR,MOTOCROSS,Open face,Full Face,Flip Up Helmet,Universal Item Length:9cm Special Function:FM,voice control,Universal Pairing Function,waterproof,Noise Reduction Special Features:Universal Pairing for any intercom Plug Type:USB Item Width:4cm Model Name:S2 Power Supply Mode:Built-in Battery Item Height:2.5cm Connection Mode:Wire,Bluetooth Bluetooth version:5.1 Operating range:Up to 1200 meters Transmission range(Hz):2.4 GHz Sensitivity:-83dBm Battery:3.7V 800mA lithium battery Standby time:400 hours Talking time:22 hours Charge time:2.5 hours Profile support:A2DP + EDR Support Siri:Yes Waterproof Level:IP67 Working temperature:-20 to 45 Celsius