Dakota Alert DCPA-2500 Duty Cycle Probe Alert 2500' Kit (Black White) 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 box on a tree or post, bury the probe near the driveway and then plug the receiver into an outlet in the house. TRANSMITTER --Runs on four CR-123 batteries (included). Weatherproof and meant to be used outdoors. RECIEVER  Four tones to choose from; Classical, Westminster, Ding-Dong or Whistle. Volume control, also a 12 VDC output and relay output. PROBE- Meant for direct burial next to the drive. Includes 50' of wire from the probe to transmitter box. Detects vehicles up to 12' away. LIVE CUSTOMER SUPPORT  If you have any questions or concerns, Dakota Alert has friendly and knowledgeable staff to help.