Bought for camping trip to blow up 5 mattresses nic. 2 doubles. Worked for one mattress then even though the fan was running the 3 pin plug socket failed. No fuse to change. Unit was still using the fan inside but no power to the 3pin.
You need to connect it to your vehicle battery direct with supplied leads. Simple enough but would have been nice if there was a power adapter to plug into the cars power socket.