Bosch B520-C Auxiliary power supply kit w/D8103, SDI2

Bosch B520-C Auxiliary power supply kit w/D8103, SDI2 Provides up to 2 A of 12 V standby current for Fire or Burglar Applications (4 A of Burglary alarm current) Supervises up to two 12 V 7-18 Ah batteries independently for up to 36 Ah of capacity Provides up to 80 hours of standby time Easy-to-read switch addressing Uses the Bosch standard TR1850 plug-in transformer