1. Bluetooth: BT5.4 + BT5.4 dual-core chip 2. Built-in 3.7V 1000mAh polymer lithium battery (782052) 3. Transmission distance: 10M 4. Two-person intercom, intercom distance: 500M 5. - intercom link, compatible with standard Bluetooth headsets, and compatible with intercoms. Audio mixing support: Intercom and music can coexist Music sharing: Music sharing and intercom can coexist Lighting mode: Supports turning the light on and off Standby time: 270 hours Talk time: 25 hours; Intercom time: 15 hours Waterproof rating: IPX6 Split installation (back clip and main unit can be separated) A voice assistant: supported Supports simultaneous connection to two mobile phones Automatic answering of incoming calls (manual mode switchable) Color:As Shown Material:ABS Package Contents: 1 * smart helmet Bluetooth headset set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.