Item type: Wireless Music Eye Patch MateMaterial: Face: Crystal Fleece Composite Sponge Bottom: Knitted Cotton Composite Cotton Color: black Weight: Approx. 103g Size: Approx. 42x11.4cm/16.5x4.5in Battery type: polymer battery Battery model: 402030 Battery capacity: 150mAh Mobile phone connection Bluetooth name: BT-MUSIC Wireless distance: barrier-free 10 meters/32.8ft and above Frequency range: 2.402GHZ Talk time: about 15 hours Standby time: about 180 days Charging time: about 2 hours Purpose: very suitable for family, office, air travel, business travel, leisure, mediation and insomnia Resting time: about 500 days (the product is not in use, the storage time is full charged. This means that the headset can be turned on without charging after 500 days of storage) Receiving sensitivity <-80dBm Charging voltage: 5V 0.7A A variety of mid-, high- and low-end Bluetooth devices including mobile phones, tablets, laptops, speakers, bracelets, watches, etc. Instructions: 1. Quickly turn on the code and press the middle button for 2 seconds, the red light and blue light will light up in turn, and then the red and blue lights will flash alternately to enter the code matching mode; the code is successful, the blue light is always on, and the mobile phone turns on the Bluetooth to search for this Bluetooth name; 2. High-quality calls and callbacks are automatically answered by Bluetooth and two-way intercom. 3. To play music with the phone, directly press the middle play button after the mobile phone is connected to Bluetooth to automatically open the music play. 4. Volume increase and decrease Long press volume-to decrease the volume, long press volume + to increase the volume. 5. Up and down song adjustment: short press volume-previous song, short press volume + next song. 6. Switch to play mode. 7. Shut down: Press and hold for 2 seconds, and the red light will turn on once to shut down. 8. Power-saving mode description: It will enter power-saving mode in about 15 seconds, which can be seen from the blue light. The blue light flashes twice in a few seconds and it is in power-saving mode. If it has been connected, when the phone has no audio coming and the POWER button is not pressed, it is always in the power saving mode. If the phone has audio coming, it will exit this mode and enter the normal mode. In addition, if the mobile phone is not connected, it will automatically shut down in five minutes after entering the power saving mode.