Description Basic Specification: ★Bluetooth Version: V5.4 ★Transmition Range: 10M ( Barrier-free environment) ★Standby Time: 180 h Working Time: 40h ★Input: 5V – 500mA ★Battery Type: lithium ion polymer battery ★Wirless Protocol: HFP/A2DP/HSP/AVRCP Key parameters: ★Power On: Press&hold for 2S ★Power Off: Press&hold for 3S ★Press Four Times to entry game mode/music mode ★Voice assistant: Press&hold 1.5S ★Vol : Press once to volume up ★Vol : Press&hold to next track ★Vol- : Press once to volume down ★Vol- : Press&hold to previous track ★Mode Button: 1. Press once to play/pause/Answer/Hang up 2. Press&hold to reject calling 3.Press twice quickly to redial last call 4.Press three times quickly to enter EQ mode.