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System status:

• Power off: Long press MFB for 3 seconds
• Volume up: short press VOL +
• Volume reduction: press VOL-
• Switching languages: double click on mfb in the link state (red and blue lights flash)

Music control:

• Play pause: press MFB
• Last number: VOL-press for 2 seconds
• Next number: VOL + 2 seconds

Phone check:

• Answer the phone: press MFB when calling
• The call: the duration of the call is MFB
• Unsigned redial: double-click the MFB key, then press MFB to cancel dialing

LED display:

• Power-on pairing: red and blue lights flash alternately
• Connection status: blue light flashes slowly (5 seconds 1 time)
• Low voltage: red light flashing (0.5 SEC 1)

Working current:

• Status parameter (4.00 v) (3.40 v)
• Nominal voltage 4.00 V 3.40 V
• Matching state current 4.33 ma-20.56 mA 4.47 ma-22.03 mA
• Standby current (Bluetooth connected) 0.43 mA-8.31 mA 0.41 mA-8.74 mA
• Play music current 19.04 Mon-23.21 mA 22.85 Mon-23.74 mA
• The call current is 23.82 ma-24.05 mA 25.19 ma-25.78 mA
• Charging current 100.0mA. 100.0 mA
• Power off current 1.4uA 1.1uA