Review on 🚗 Efficient and Portable GSPSCN 12V Air Compressor Pump: Digital Display Tire Inflator with LED Flashlight, Dual Cylinder Design, 150 PSI Pressure, Auto Locking Air Chuck - Ideal for Auto, SUV, Off-Road, Truck, RV, Bike by Abdullah Huan

Tire pressure was not accurate from the start. I set it to 35 and it increased to 37/38/39. I set it to 33 and got a pretty consistent 34/35. However, sometimes it didn't work as expected. Most of the time it worked as I expected. Plug it in, connect the hose to the valve (already set to 33) and turn it on. It will read about 5 psi less than when the switch was turned on, where the displayed number jumped 5+ psi. Then there were times when it stalled at 25-27psi (again when it was set at 33). I turned off / waited 5 seconds / turned on and got the same result. After inflating 3 or 4 times, it was completed as expected. It wasn't the reliability I expected. But then again, it worked quite well in most cases. To return.