Visual, audible, smart. DITEK's DTK-120X12 sets a new standard for 120VAC power and low voltage surge protection. It will protect your system power and up to twelve (12) pairs of SLC, IDC/PIV, NAC, network or dialer circuits. This combo unit comes equipped with a DTK-DF120M, 120VAC, replaceable surge protection module and a 6-position mounting base for replaceable, low voltage surge modules. Adding DTK2MHLP/2MHTP modules for data/signal and dialer circuit protection provides a complete solution for your fire alarm system.Main FeaturesAudible alarm can be silenced via the included time delay switch (24 hours)3/4" NPT pre-drilled holes for AC power conduit(1) 3/4" NPT and (2) 1/2" NPT pre-drilled holes for low voltage wiring conduitUL1449 Listed Type 2 SPDUL1283 Listed EMI/RFI