Feature:1. Wireless Music: The function can connect to your mobile phone, free your hands, let you enjoy the safe riding, high quality music, surround sound, and make your life full of fun.2. Connection Distance: Built in 5.0, compatible with almost all mobile devices that support Bluetooth. Maximum effective distance is 20‑30m / 66‑98ft.3. Perfect Sound Quality: Through the use of windproof and a more stable connection. For DSP noise reduction technology, high volume, this helmet headset transmits clear and high quality stereo music.4. Long Working Time: The device uses an integrated rechargeable lithium battery with long standby and working time. 160h standby time. 8h working time. The intercom headset takes only 2 hours to fully charge.5. Easy To Install: The earphone adopts detachable hook&loop design, easy to install in the helmet, and fixed firmly. Provide efficient and convenient communication during riding.How to Use:Power on, it can be used after Bluetooth connection.Specification:Item Type: EarphoneMaterial: ABSModel: MH03Colour: BlackFunction: Wireless Sound TransmissionScope of Application: Smart devices with BluetoothBluetooth Version: 5.0Frequency Range: 2.4026GHZ-2.480GHZCharging Time: 2 hoursStandby Time: 160 hoursContinuous Working Time: 8 hoursBluetooth Transmission Range: 20-30m / 66-98ft (depending on the environment around the obstacle device)Microphone Transmission Distance: Less than 1 meterBuilt In Battery: 180mAh lithium battery (included) Package List:1 x Headphone1 x Charging Cable1 x Manual