Working distance:1000m for two riders (under ideal environment) Working frequency: 2.4GHz Bluetooth version: 5.1 Supported BT protocol: A2DP and AVRCP Operating range: up to 10 meters for cell phones Battery type: 1000mAh rechargeable lithium polymer Standby time: up to 500 hours Talk time: up to 28 hours in phone call intercom mode; up to 33 hours in music mode Charging time: about 2 hours Power adapter requirement: 5V/1A Charging port: Type-C Operating temperature: 41°F-104°F(5°C-40°C) Storage temperature: -4°F-+122°F (-20°C-+50°C) Color: As shown Material: ABS Package Contents: 1 x for Host 1 x USB Cable 1 x Headphone Cable 1 x Hard Mic & Soft Mic 1 x Flat Mount 1 x Clip Mount 1 x Buckle Package 1 x Screwdriver 1 x Fastener Tape 1 x English instruction manual 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.