Specifications
Playback time : up to 7 hours
The standby time: up to 15days
Fully charging time : 2 hours
Bluetooth version: CSR8635 / V. 4.0, Class II
Weight : 133 grams
Speaker Type: Bone conduction technology speaker, 1w dual speaker
Mic: Anti-interference microphones, -50DB
Mono/Stereo: Stereo
Battery: 320mAh, Polymer battery

How to Wear
Hang 2 at the back of the neck and tighten up using Velcro so that both sides of the speakers stay close to the cheek bone near the ears. Wear 1 on the head and tighten the buckle above the ear.

How to operate
Power on/off: Long press Power button 3s
Answer/Ending call: Click the Power button
Reject call: Long press Power button for 1s
Play/Pause phone music: Click Power button
Switch songs: Long press "+""-" button
Volume control: Click the vol button "+""-"
Match again/manual matching: Shutdown state long press power button 6s
Up/down: Click "+" "-"
What Included in the package:
1pc*wireless bone conduction headphones anti pollution mask
2pcs*Filter Cotton
1pc*USB charging cable
1pc*Instruction manual

Notes:
Products should be stored under a cool and dry environment with 0~45? temperature. This product is not entirely waterproof so do not use underwater. Check before charging if there is any liquid to prevent headset damage. If the connecting distance is beyond the bt headphone effective range(10m or 33feets), the headphone will disconnect with the device. Once in effective range again, they will connect again automatically. But if the disconnecting continues for long time(over 3mins), you maybe need manual matching

Please adjust the volume when using the headset to avoid hearing damage.

• Built-in Headphone and Free Your Hands: Wireless bone conduction headphone ensures handsfree calling / answering and music listening in driving,riding.
• Free Breath and Pure Filtration: Professional anti pollution mask makes you far-away from PM2.5
• Less Interference and More Safety: Bone conduction speaker makes the sound directly transmitted to bone chain through internal conduction of bone, helps you enjoy the purest sound and keep sensitivity to surrounding sound in a noisy environment
• Scientific Design and Good Fitting: The three dimensional structure is designed precisely based on the data about facial structure in recent 20 years, repeat molding and correction help make it fitting to different facial shapes
• Clear Communication and Infinite Sharing: Built-in anti-interference microphone with sensitivity up to -40±30DB, together with three-dimensional cutting of mask, reserves sufficient space for sound production, helps you communicate clearly without any obstacle

Built-in Headphone and Free Your Hands: Wireless bone conduction headphone ensures handsfree calling / answering and music listening in driving,riding.PowerRider