SMP3 Kits Single Output Power Supply/Chargers Overview These switching power supply/charger kits have a wide range of applications including: access control, security and CCTV system accessories that require additional power. Features/Specifications Filtered and electronically regulated outputs. Short circuit and thermal overload protection. Built-in charger for sealed lead acid or gel type battery backup. Maximum charge current .3 amp. AC input and DC output LED indicators. Lifetime Warranty. SMP312C 12VDC output. 2.5 amp continuous supply current. Kit includes: power supply, 12VDC 4AH rechargeable battery and 16.5VAC 40VA Class 2 Rated plug-in transformer. SMP312CX 12VDC output. 2.5 amp continuous supply current. Kit includes: power supply, 12VDC 4AH rechargeable battery and 16.5VAC 40VA Class 2 Rated plug-in transformer. Board Dimensions (approximate): 3? ??W x 3.5? ??L x 2? ??H.