No. Of Onboard & Supported Zone: 16 To 128 Zone, No. Of Onboard & Supported Output : 16 To 128 OutputMax Keypad Support: 1 Keypad Display Type: LCD Only, Support PC Programming: Yes Support Mobile Apps: Yes (ADD ETHM-1 MODULE) Supported Partitions: 32, Supported Timer: 64, Maximum No. User: 249, Maximum Phone No: 1, Supply voltage (±15%): 20 V AC, 50-60 Hz, Board dimensions: 264 x 134 mm en