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The DCRH-2500 is a very reliable and easy to install driveway alarm. The transmitter operates on one 9-volt battery and has 25' of 3/8" diameter exterior hose that will lie across the drive. When a vehicle drives over the hose, a signal will be sent to the DCR-2500 receiver up to 1/2 miles away (Actual range will vary depending on the environment)
The transmitter is weatherproof and meant for exterior locations. Up to 4 zones can be monitored with additional transmitters. The transmitters can be programmed so they will each sound a different tone at the receiver.
Note: this transmitter is only compatible with the 2500 series receivers.