The AL624 kits are Linear Power Supply/Charger Kits, which convert an AC input to a regulated low voltage DC output. This general purpose power supply has a wide range of applications for access control, security and CCTV system accessories that require additional power.The Kit includes: Power Supply board, Battery and Wall plug - in Transformer. • 12VDC power limited output. • 1.2 Amp continuous supply current at 12VDC. • Kit includes: power supply, 12VDC 4AH rechargeable battery and 16.5VAC 20VA class plug - in transformer.