Sescom SES-XLR-ISO Inline XLR Line Matching Transformer Ampridge There is also a magnetic

There is also a magnetic door/window contact and terminals for either a normally open (N/O) or normally closed (N/C) input

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You can also use this set as a typical point-to-point extender and transmit for up to 394 ft over a single Cat6 cable or 328 ft over a Cat5e cable

The front of the EV1 has a locking

Sescom SES-XLR-ISO Inline XLR Line Matching Transformer Ampridge There is also a magneticThe SES XLR ISO from Sescom is an inline XLR line matching transformer. It is installed between a pair of XLR cables to eliminate audio hum. The unit has a shielded, ultra rugged housing and standard XLR connectors with a 600 ohm impedance.