"Item Type: Smart Glasses Material: ABS, PC, Electronic Components Weight: Approx. 181g / 6.4oz Battery Type: Lithium Battery (Shipped with Built in Battery) Battery Capacity: 80mah Talk Time: 6 to 8 Hours Charging Time: 1 to 2 Hours Bluetooth Version: V5.0 Transmission Distance: Outdoor Linear Distance of 15-20m/49.2-65.6ft How to Use: Audio glasses on, off operation: Power on: long touch MFB 3 seconds to turn on (red, blue lights flashing fast) (cue: Power on) that is, turn on. Turn off: touch MFB 3 seconds in the state of power on, the light becomes red for 2 seconds long (cue: Power off) has been turned off Audio glasses pairing and disconnection operation: 1, Enter the pairing mode, boot into the pairing mode, red and blue lights alternately flashing (prompt: Pairing) can start pairing 2, Pairing between the left and right: if the pairing is successful blue lights alternately flashing, the left ear blue light slow flashing (beep: DU); cell phone pairing: if the pairing is successful, left ear blue light does not flash (beep: Bluetooth has been connected) Audio glasses disconnection operation 1, Bluetooth disconnection between the left and right ears, the right ear red blue light alternately flashing 2, Bluetooth disconnection between cell phones, the left ear red blue light alternately flashing Audio glasses touch function operation 1, After the power on: double click to switch between English and Chinese. 2, Tap: pause play answer hang up. 3, Double click: left ear: the next song, right ear: the previous song 4, Three clicks: left ear: volume down, right ear: volume up 5, Long press 2S: wake up voice application 6, Auto power off: 5 minutes (beep: Power off) Low battery beep: 1, In the voltage below 3.3V reported low prompt (30 seconds apart once) 2, LED display: light turns red and blinks slowly (beep: low battery) Charging: 4.0V or less, the red light is on for a long time; 4.1V full charge, the blue light is on" 1Open Sound: Two speakers and a custom audio processor deliver clear sound to the space around your ears. Enjoy music while maintaining awareness of your surroundings 2Make a Call: Just touch the audio glasses leg to answer the call. Dual microphones capture your voice clearly under the noise. It also prevents people around you from hearing your calls 3Detachable: Has a detachable front frame so you can switch between polarized sunglasses and blue light filter designs at any time 4Comfortable: Flexible hinges ensure audio smart glasses fit a wider range of faces and are comfortable to use 5Super Endurance: One charge, can provide up to 8 hours of use, you can use it when hiking, running errands, or doing housework