The display on the left shows everything each slot is doing volts mah and amps it cycles 1 thru 6 or if you want to know a specific slot there is a button on the front of each slot that you can push and display will go to that one, it's really a great charger from what i have seen. If you have and android device you can add an app for bluetooth display of the charger which its not a must have but pretty cool. MVS has them and I'm pretty sure most online stores have them in stock now as they came out last weekend.