Yes. As long as your item is 12V battery-equipped, the unit is capable of jump starting it.

Please make sure charge is 50% or more, if not, charge the jumper and try again. In the winter, due to low temperature you may need to try several times more, but please note that don't start continuously more than five times, otherwise it may damage the product. This product is only compatible with 12V batteries. If you still cannot start your car, please check if there is starting malfunction on the vehicle.

Please make sure that the clicking niose comes from the engine or the smart clamps. The former indicates that the starting current is not enough, and the latter is normal, it will appears after connecting the battery (disappear after 3 minutes).

Yes. As long as your item is 12V battery-equipped, the unit is capable of jump starting it.

No. The unit works on cars only. The air compressor will stop running when it encounters air pressures required to inflate larger vehicle tires. If you need a jumpstarter or inflator for a truck or a heavy vehicle, please contact us for a return or an exchange.

Please check the tire label. The unit can inflate tires at less than 255 wide/R19 wheel diameter at any aspect ratio.

You can flip the switch to turn it off the after the unit stops automatically. Wait 10 minutes or more to cool the unit down before restarting manually, and the unit will continue to run for a longer time.

1) The size of your tires exceed the unit's pumping range; 2) To prevent overheating, the Over-Temperature Control automatically shuts the unit off when it gets too hot. After a few minutes, it will restart and run until it has reached the preset tire pressure.

Main reason is when air compressor is working the cylinder will generate a great deal of heat, if keeping the air compressor working for over 10 minutes, it may shorten the unit's life-span and increase the risk of damage.

Yes. It comes with 4 nozzle attachments with which you can pump up many other inflatables conveniently.

Do not use any functions while it is charging.

The item uses a 5-segment display to mark the power level, which means it will show only 25% (flashing), 25%, 50%,75%, and 100%, according to its actual power. When it's between 75% and 100%, it displays 100%, but between 50%-75% it shows 75%. For example, if the charge is 76%, it displays 100%. After being used for a short while, the actual power drops to 74%. Then the display will show 75%.

"First, please note that if you recharge the unit properly, ""IN"" will flash on the power screen. If not, it means the unit or the charger adapter is malfunctioning. We suggest you use another AC adapter or a car charger to exclude other factors."

"This model supports AC charging to power the battery only. It will run only on DC power to inflate tires if the unit has a minimum of 25% power left. The ""JF.EGWO MAX"" and ""JF.EGWO ULTRA"" models support connections to 12V DC car chargers even when the unit is losing power."

Yes. The two USB ports can charge any of your 5V devices, such as smartphones, tablets, etc. You can use two USB at the same time.

No. It is prohibited to use any functions when the unit is being charged. Please recharge the unit before use if it has run out of power.

Long press the power button to turn on the lights. Press the button once at a time to select "strobe mode," "SOS mode," or to turn off the lights.

Probably it has run out of power; please recharge it with A/C charger or car charger. We suggest you fully charge the item every 3 months if it hasn't been used.

It will shut off automatically 2.5 minutes after it stops working, you don't need to switch it off manually.

The jumpstarter has a less than 100-watt lithium battery built-in. You can take it on some flights. Please check with your airline.

Under normal conditions, you can store our products at a minimum of -40 degrees and a maximum of 140 degrees Fahrenheit.