Feature:1. Innovative ear button semi‑in‑ear design, using ergonomics, will not hurt after a long time, and can not be thrown off wildly.Specification:Item Type: Wireless Bluetooth EarphoneMaterial: ABSBluetooth Version: 5.3Working Environment Temperature: -10℃-55℃Effective Distance: ≤10m / 32.8ftBluetooth Configuration Files: A2DP AVRCP HSP HFPResponse Frequency: 20hz-20khzInput: 5V, 1AOutput: 5V, 1AFrequency: 2.4 GHz -2.48 GHzSensitivity: 96 db + 2dbEarphone Battery: 50mAh Lithium Battery, Charging Case Battery: 2200mAh Lithium BatteryHow to Use:1. Special note: The first time you use the same earphone or earphone into the charging compartment for two hours and then use it again. You need to take out the headset and put it back.2. The charging compartment calls the headset to realize the automatic power-on function of the headset. The earphones are matched. If the left and right ears cannot be paired, please do the following: The operation steps of the earphones, turn on the two earphones at the same time, the red and blue lights will flash alternately for about 10 seconds. By default, the default main channel is turned off. The red and blue indicator lights flashed slowly, and the TWS team succeeded. At this point, the Bluetooth of the mobile phone can be paired with the search connection. After the pairing is successful, the headset will not flash mode.3. Earphone single ear operation steps: take out any earphone from the charging compartment to start, the red and blue indicator lights flash alternately. Blinking for about 6 seconds, then turn on the Bluetooth of the mobile phone to pair and search for the connection. After the pairing is successful, the headset will be used.Package List:1 x Manual 1 x Charging Case1 x Charging Compartment1Pair x Earphone