Product information: Usage: cycling intercom, GPS navigation, automatic answering calls Size :155*100*60 (mm) Applicable model: Motorcycle Bluetooth version: 5.1 Chip: CSR BC5 Battery capacity: 850 Battery type: polymer Charge and discharge times: 500 Operating voltage: 3.3V-4.2V Talk time: 12 hours Standby time: 200H Charging time: 2.5H Operating temperature range: -10℃ to +45℃ Charger specifications: DC 5V 500mA Packing list: 1* Intercom+headphone+manual+screwdriver+charging cable+mounting clip+headphone Velcro four+two screws Product picture: