KZ ZST Dynamic Hybrid Dual Driver in Ear Earphones (ZST Bluetooth Module);

Power on:
Press and hold the power button for 3 seconds (Blue LED light flash twice, while the boot prompts)
Bluetooth Connecting:
Power on and continue to press the power button for 3 seconds. (Red LED lights flash once, while the machine voice prompt)
Power off:
Press and hold the power button for 3 seconds. (Red light flash once, while the machine voice prompt)

Parameter:
Bluetooth Version: 4.1
Weight: 10±3g
Pin type: 0.75mm
Wire length:85cm ±3cm
Shell material: ABD
Bluetooth Communication distance: 10M
Standby time: about 175hours
Charging time: about 2hours