Product details:

The DCRH-4000 is a very reliable and easy to install driveway alarm. The transmitter operates on one 9-volt battery and has 25 of 3/8diameter exterior hose that will lie across the drive. When a vehicle drives over the hose a signal will be sent to the DCR-4000 receiver up to 1 mile away*. The transmitter is weatherproof and meant for exterior locations. Up to 12 zones can be monitored with additional transmitters each zone can be programmed so they will sound a different tone at the receiver.