
HHJ Electric Air Duster

How does the battery indicator work?
The power bars light up sequentially while charging and stay steady when fully charged. Bars fade gradually during use. The lowest bar blinks slowly at low power. The empty frame flashes five times then powers off when undervolted.
How to adjust speed gears?
Hold the power/gear key for 1 second to turn on/off. It defaults to gear 1 with power display and automatic motor operation. Short press to switch gears cyclically. The device enters sleep mode 3 minutes after the motor stops.
What are the charging specs?
It takes about 85 minutes to full charge via 20W PD adapter. The built-in cable and Type-C port support PD & QC fast charging up to 20W input. Charging starts automatically on connection and stops after unplugging.
What about its external discharge function?
It can charge other devices via built-in cable and Type-C port with 30W max output. Discharge activates on connection and stops once disconnected. It covers PD, QC, AFC, FCP, SCP, MTK PE and other mainstream protocols.
What are low battery alerts and fault codes?
The lowest bar blinks below 6.2V in motor mode or 6.4V in discharge mode. The frame flashes 5 times and shuts down at 5.7V or 6.3V. Recharge to reboot after undervoltage shutdown. C stands for overheating, E refers to motor failure.
HHJ Electric Air Duster

How does the battery indicator work?
The power bars light up sequentially while charging and stay steady when fully charged. Bars fade gradually during use. The lowest bar blinks slowly at low power. The empty frame flashes five times then powers off when undervolted.
How to adjust speed gears?
Hold the power/gear key for 1 second to turn on/off. It defaults to gear 1 with power display and automatic motor operation. Short press to switch gears cyclically. The device enters sleep mode 3 minutes after the motor stops.
What are the charging specs?
It takes about 85 minutes to full charge via 20W PD adapter. The built-in cable and Type-C port support PD & QC fast charging up to 20W input. Charging starts automatically on connection and stops after unplugging.
What about its external discharge function?
It can charge other devices via built-in cable and Type-C port with 30W max output. Discharge activates on connection and stops once disconnected. It covers PD, QC, AFC, FCP, SCP, MTK PE and other mainstream protocols.
What are low battery alerts and fault codes?
The lowest bar blinks below 6.2V in motor mode or 6.4V in discharge mode. The frame flashes 5 times and shuts down at 5.7V or 6.3V. Recharge to reboot after undervoltage shutdown. C stands for overheating, E refers to motor failure.

























































