 The mini boost 5 volt at 1 amp. Let's see here. I've got a 2 AA battery pack and right here I have a Metro mini. So any of your AVR boards if you're trying to run Arduino Uno or this little Metro mini those really want 5 to 9 to 12 volts in. I've got my mini boost and it is receiving this roughly 3 volts from the battery so that's on its in and then on its 5 volt out. I'm driving the Metro mini there and then I have a neopixel ring here. This is plugged into 5 volts on the Metro mini as well and it's getting data over IO pin. So this is great. You've also got the enable pin on there so if you want to use a power switch an on-off switch if I flip this on you'll see I've got my LED ring there with the full 5 volts that it wants boosted up from the 3 that it was initially going to give us off of that battery. The mini boost 5 volt 1 amp.