1It uses vibrations to transmit sound, removing the load on both ears and allowing the hearingimpaired to hear more clearly. 2Bone conduction headsets with Bluetooth 5.0 wireless connection can listen to music and receive calls without inserting a receiver into the ear canal, and your ear can hear ambient sounds very safely. 3Sturdy and durable and sweatresistant, bone conduction headphones are ideal for running, biking, fitness, hiking, mountain climbing and driving. Antiperspirant design can protect ears. 4Enclosed body design, effectively prevent daily splashing and sweat. Easy to clean material, simple wipe can be returned as before. 5Builtin 300 mah lithium battery, low power consumption, long battery life, about 5 hours of continuous music time, about 20 of long standby. Item Type:Bone Conduction Earphone Material: ABS+Silicone Color: As Pictures ShownWeight: Approx. 116g/4.1oz Model: BH318 Connection: Wireless Bluetooth 5.0 Wireless range: about 15 meters/49.2ft Speaker impedance:103db Microphone sensitivity: -38 3dB Battery type: 300mAh lithium battery Music playing time: about 5 hours (in standard condition) Standby time: about 20 Charging time: about 2 hours How to use: 1. Power on: the headset is off, press and hold the power button for 3 seconds, the blue LED light is flashing, and the prompt sound: power on 2. Power off: the headset is in the power-on state, press and hold the power button for 5 seconds, the LED red light will flash once to power off, the prompt sound: poweroff 3. Connect BT: power off, press and hold the power button for 3 seconds to enter the pairing state, the LED indicator light flashes red and blue, the earphone prompt sound: Pairing; the device (smartphone, tablet, etc.) searches for BH528, click connect; connect Success; when the headset is successfully connected to the device, the blue LED light flashes for 5 seconds, and the headset prompt tone: Connected 4. Pause/Play: In the state of music playing, quickly double-click the multi-function touch button to pause, and then quickly double-click the multi-function touch button to play 5. Answer/Hang up: In the incoming call state, quickly double-click the multi-function touch button to answer, long press the multi-function touch button for 2 seconds to reject the call, and in the call state, quickly double-click the multi-function touch button to hang up 6. Volume increase: click the volume increase button 7. Volume down: click the volume down button 8. Next song: Long press the volume up button for 2 seconds 9. Prev song: Long press the volume down button for 2 seconds 10. Sound assistant: Quickly touch three times to enter the voice mode, and then quickly touch three times to exit 11. Reset: After plugging in the charging cable, the headset will reset and shut down to charge 12. Clear the pairing information: when the power is off, press the power button and volume down button at the same time for 5 seconds to clear the pairing information 13. Charging: When using the charging cable, plug the earphone into the USB power source. In the charging state, the LED indicator is red, and when the charging is completed, it is blue. 1 x Earphone 1 x Power Cable 2 x Ear Cap 1 x Manual