Product Specifications: Special Features: 600M Interphone For More than 6 Riders or Music Sharing Applicable Helmet Type: Half Helmet,MODULAR,MOTOCROSS,Open face,Full Face,Flip Up Helmet,Universal Number of speakers: Half-duplex communication with countless people Bluetooth connection: music sharing, Bluetooth music Charging time: 2.5 hours Battery life: 24 hours Waterproof: IP56 dustproof and waterproof Speaker research and development: titanium alloy speakers, high and low frequencies, high standards Bluetooth technology: 5.4 (faster transmission speed) Voice assistant: Ai wakes up voice with one click Half-duplex intercom: Connection conditions: the machines need the same model to be paired, unlimited number of people within the effective distance. Connection: After the two machines are turned on, press the mode key to switch to half-duplex speech mode, when one of them needs to speak, press and hold the speech key without letting go, it can speak, let go and exit when the other one needs to speak, the same operation can realize half-duplex speech. When the other one needs to talk, the same operation can realize half-duplex talk. When half-duplex talk: only one unit can be allowed to enter the talk state, the other one can't be in the talk state. Music Sharing Pairing After both devices are turned on, press the Mode button briefly. Switch to music sharing mode, in music sharing mode, double press the mode button. Switch between music sharing transmitter and music sharing receiver mode. Description: 1. 5.4 Bluetooth chip system with smooth and powerful performance. 2. Single channel intercom effective distance unlimited number of people: -Newly developed half-duplex intercom function realizing talking in unlimited number of D3X Headset within 600m effective distance, more effective communication. 3. Music Sharing Multiple people listening to the same song: -Support music sharing function, support one D3X Headset in the 10m effective distance to share to more than one D3X Helmets, listen to the same song, together to get high! 4. IPS6 dustproof, waterproof, and rain resistant, fearless of dust and sand. 5. Wake up the Al voice assistant with one click. 6. Long-lasting battery life for a full day of riding pleasure: -1000mAH high-capacity battery, charging time:2.5 hours,strictly selected high-voltage chip lasting 22 hours or so, fast charging riding all day long, 7. Long lasting endurance, large capacity battery, long listening time, long riding distance. 8. Automatic answering of incoming calls is safer and more convenient. 9. Intelligent noise reduction and filtering to enjoy pure sound quality. 10. Support one to two connection for two phones at the same timeMultiple international professional testing and certification. Package includes: 1 or 2x Earphone 1 or 2x Base 1 or 2x Integrated Full or Half helmet microphone 1 or 2x Charging cable 1 or 2x Six-language manual 1 or 2x Installation package Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.