Item Type: Helmet HeadsetMaterial: Silicone + Plastic + SpongeWeight: Approx. 95g / 3.4ozColor: Black Version: 5.0Battery Capacity: About 300mAhCharging Voltage: USB5VWorking Hours: About 70 hours (According to the volume of the call and listening to music)Noise Ratio: 80dB Distance: 20m / 65.6ftAnswering Method: Automatic Answering / Manual AnsweringStandby Time: About 1000 HoursFrequency: 180-2000khzWaterproof Grade: IP5 Grade (Note: rainproof, can not be immersed in water)Product Size: Approx. 7.5x3.4x2cm / 3.0x1.3x0.8inHeadset Hose Length: Approx. 23cm / 9.1inIntelligent Voice Aid:Short press once: turn on/off the voice aidShort press twice: the last callShort press once: up the callHow to Use:1. On/OffLong press for 3 seconds to turn on, the red light is on. After the voice prompt is turned on, the blue light flashes to indicate that it is turned on.Press and hold for 3 seconds to turn off. The red light flashes and then goes out, indicating that it is off.2. Charging managementWhen the built-in power supply of the machine is lower than 15%, the red light flashes, and the voice prompts Insufficient power supply, please charge.Plug in the charging cable to charge, the red indicator light is always on, and when the battery is full, the battery will turn blue.After each charge, you need to restart.3. pairing connectionTurn on the machine, then turn on the of the mobile phone, and then find the name BBT to be connected. After the connection is successful, the machine language prompts connection.After the first connection is successful, the machine will automatically connect with the mobile phone for the second time.4. OperationA. Intelligent voice callTo open the mobile voice aid, for IOS needs to open for , tap the device button and say: Call..., the device will automatically dial ... call without taking out the phone