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5x Key Switch Form C + N.O Momentary Ademco Securitron
A nice touch on the TEAC Corporation Tascam X-48 is the included remote control capability.
Heavy Duty DPDT Key Operated Switch Keyswitch New CCTV
The 152226 model handles continuous use without overheating.
2x 24Vdc Power Supply 1.2Amp Ademco Access Control
Model 1007373 is a straightforward machine that does exactly what you need.