Brand Name: EJEAS High-concerned chemical: None Support intercom: Yes Battery Included: Yes Certification: CE Origin: Mainland China Item Weight: 28 Maximum Number of Speakers: >6 Plug Type: USB Maximum Intercom Distance: 500-1000m External Testing Certification: ce Applicable Helmet Type: Half Helmet Applicable Helmet Type: MODULAR Applicable Helmet Type: MOTOCROSS Applicable Helmet Type: Open face Applicable Helmet Type: Full Face Applicable Helmet Type: Flip Up Helmet Applicable Helmet Type: Universal Item Length: 8.5 Item Type: Helmet Headset Special Features: FM Special Features: With Remote Control Special Features: Waterproof Special Features: Noise Reduction Special Features: Bluetooth 5.1,Upto 7 Riders intercom Item Width: 2.0 Model Name: Q7/Quick7 Power Supply Mode: Built-in Battery Item Height: 4.5 Connection Mode: Wire Connection Mode: Bluetooth Bluetooth Version: 5.1 Battery Parameter: 3.7V/750mAh Audio encoding format: SBC AAC Electric Parameter: DC 5V/1A Charge Time: About 3 hours Endurance: 22 hours Standby time: 260 hours Charging interface: Type C Waterproof rating: IP65