Fineblue GTO Helmet Headset Bluetooth Headphone Handsfree Earphone for Motorcycle 2 Micphone 16 Hours Play Time Moto IPX6Item Name: Helmet Bluetooth EarphoneModel: GTOBluetooth Version: 5.3Transmission Distance: 15mCharging Time: 2.5 HoursTalking Time: about 16 HoursPlaying Time: up to 16 HoursStandby Time: up to 300 HoursSensitivity: 110+/-3dB