Inim, Previdia Compact 1 loop analog fire alarm system (not expandable) with a touch screen. There up to 240 devices can be connected to the loop. Panel has a small light gray enclosure 322 x 324 x 86mm (HxWxD) with 1.5A @ 27.6 VDC switching power with room for 2 x 7 Ah Batteries.