HQRP 3-Volt Battery (2-Pack) compatible with Petsafe Innotek RFA-188 BP1-RFA-188 Replacement plus Coaster HQRP&reg; Lithium Battery (2-Pack) plus HQRP&reg; Coaster; Battery Voltage: 3V; Capacity: 160 mAh; 100% compatible with Original Battery; Each lasts 1-2 months, 30 Days warranty!