a few vintage EHX and many others. Due to its very high 800mA current capability at 9 or 12V you can with this single outlet power one of the big units like Line 6 M9 or M13, VOX ToneLab or some older BOSS GT-XX Processors just to mention a few. The mA-meter allows you to measure all your pedals' current draw so you can use the correct outlet for each unit without "wasting" power by connecting say a 160mA pedal to a 400mA outlet instead of using a 200mA outlet. Also if you like to power three pedals using our 3-way daisy chain you can check their total mA figure and match them to an outlet with sufficient power. Should you need more outlets, even more power or some AC you can ad another CIOKS link Power Supply to it. With the new DC10 link you get the best of the best from CIOKS.