•Maximum output of switching power supply: 3A
•Zone numbers: 1, 2, 4 zones
•AC input: 100AC-240AC
•DC output: 24 VDC
•Battery type: 2 x 12 V/1.3Ah
•Maximum number of smoke detector/heat detector per zone:20pcs
•End of line resister:4.7k
•Alarm output: Relay/zone
•Siren output: 2 x Available
•Body material: Iron
•Operating temp.: -10℃~+50℃
•Operating humidity: ≤95 RH
•Dimension: 300x 200x 91mm