ZOLL CPR Uni-Padz III Electrode Pads exclusively for the ZOLL AED 3 (non-BLS models). The CPR Uni-Padz are dual-function electrode pads for use on adult and pediatric patients. Adult placement would be the standard upper right chest/lower left side, while the pediatric placement would be front and back. See diagrams on the pads for proper placement. ZOLL CPR Uni-Padz III has up to a five-year life span.