Inim, Previdia Compact 1 loop analog fire alarm system (not expandable) with a touch screen. Up to 64 devices can be connected to the loop. Panel has a small light gray housing 322 x 324 x 86mm (WxHxD) with 1,5A @ 27.6 VDC switched mode power supply, with room for 2 x 7Ah Batteries.