Brand new modules. factory fresh! never used or even opened.
Bosch B520 Aux power supply.
- 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