Model Number: XO-BE47Earphone Size: 97*45*23mmBluetooth Operating Frequency: 2.4-2.48 GhzCharging Voltage: 5V 1A/2ACharging Time: About 2 to 3 hoursRecommended Functions: Supports simultaneous connection of two mobile phonesWaterproof Rating: IPX6 waterproofBluetooth Distance: 10-20 metersHorn Size: 40mm Speaker UnitOperating Hours: Approx. 25-30 hours Standby time: About 300 hours Installation: Self-adhesive and clip-on Multilingual: Free switching between Chinese and English, (Spanish, Japanese, etc. can be customized) Applicable scenarios: Suitable for most helmets, closed helmets, rally helmets, vintage helmets, 3/4 helmets. Functionality: Support Bluetooth 5.3 call, listen to music, voice, navigation, support smart voice assistant with one key to wake up, support automatic/manual answer without switching Battery capacity: 800 mAh Broadcast time: About 10 hours Package size: 183*115*42mm