Catalog > Consumer Electronics > Security & Alarms > Alarms > Alert Systems ZKT PS902B ZKT PS902B ZK TECO POWER SUPPLY WITH BATTERY BACK-UP 220VAC 50Hz (110v optional) OUTPUT 12VDC 5A,12V 7AH BATTERY NOT INCL. Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE