Bosch Plug On Zone Expander - CM707B AI Recorder It can store up to

It can store up to 2

No interference on electrical or electronic equipment

The B308 can interface with building components such as HVAC

The VB-HD5P comes as a pair for the transmitting and receiving ends of your cable run

Bosch Plug On Zone Expander - CM707B AI Recorder It can store up toIt can be added via the expansion port on the CM705B Universal Expander to provide an additional 8 hard wired zone inputs, bringing the CM705B to 16 hard wired zone inputs for Alarm + Tamper, 4 state monitoring or Single EOL configurations. Plugs on to the CM705PB zone expander. Adds an additional 8 zones to the expander. Available from Cheap Alarm Parts.