Dakota Alert MAPS MURS alert probe sensor- Long vary wireless driveway alarm that will detect automobiles only- Combines the features of the vehicle sensor drive alert with MURS alert know-how- Very reliable and won`t give false indicators from giant animals or other sources- When a car is detected, it is going to send an alert signal to both the M538-BS or M538-HT transceivers. The alert sign shall be in spoken English and say \"Alert Zone One,\" \"Alert Zone Two,\" \"Alert Zone Three,\" or \"Alert Zone Four\". The 4 alert messages are simply chosen on the transmitter in order that up to four completely different zones might be monitored simultaneously.- 5 Channels and 38 sub channels to choose from, to assist get rid of interference from other users- Operates on 6 AA alkaline batteries- Battery life should be about six months underneath most circumstances- Probe is related to the transmitter box with 50 ft of direct burial cable (this can allow for a more covert installation)- MURS transmitter will have a spread of up to several miles again to the hand held or base station radios. Sure Content material THAT Seems ON THIS SITE COMES FROM AMAZON Services LLC. THIS Content material IS Supplied \"AS IS\" AND IS Topic To alter OR Elimination AT ANY TIME.