Dakota Alert 2500 Wireless Rubber Hose Vehicle Sensor, White Black (DCRH-2500) RELIABLE & RANGE Dakota Alert has been in business for over 25 years with a proven record of reliability and dependability for all our products. Up to a  wireless mile range. Much better range than competing products. INSTALLATION  Easy do-it-yourself installation. Mount the transmitter on a tree or post, lay the hose across the driveway and then plug the receiver into an outlet in the house. RECIEVER  Four tones to choose from; Classical, Westminster, Ding-Dong or Whistle. Volume control, also a 12 VDC output and relay output. TRANSMITTER --Runs on a 9 volt battery, detects vehicles that drive over the hose. Weatherproof and meant to be used outdoors. LIVE CUSTOMER SUPPORT  If you have any questions or concerns, Dakota Alert has friendly and knowledgeable staff to help.