... 2 x AAA batteries (batteries not included), or DC 6V power supply Size: XS, S, M, L, XL, XXL, XXXL, XXXXL ... only 2.Remove EL panel, battery pack and the whole power cord carefully before washing 3. Do not submerge any part of ... , don't use mixture batteries 2. Slide switch to Operate Power 3. Don't bend or apply pressure to the flash ...