Review on TOAUTO A3 PCP Air Compressor, Unique Vertical+Wire Spool Portable Design, Auto-Stop, Oil/Water-Free, 4500Psi/30Mpa, 8MM Quick-Connector For Paintball/PCP Air Rifle/Tank, 110V AC Or 12V Car Battery by Sin Gabriel

I like this unit because it's got a built in power supply and it can fill upto 5000 psi. You can just plug it into the wall or use a battery. It's kind of loud, the fan seems overkill, but it doesn't over heat and it fills my tanks and my PCPs. It's not fast, but way better than manual pumping and it's set and forget so if you can stand the noise, it takes care of your fill needs. HATSAN users will need an adapter, works natively with Benjamin Marauders.