Every back yard grower should have one of these. They all called driveway wireless alert ststem. They are sold at HF for $18. They are small and simple to use. even if you have dogs you can tweek with them. I have 6 of these in my back yard. If anyone is in my back yard I will know. I can carry the reciever in my back pocket. Or put it next to your bed. Not everyone will like to confront a ripper. Some people can fight. Some people can. If this is the case you can put one outside to scare the ripper off fast. And have one at your bed side. After the alarms go off you can go see what happend and see how he got in. If you would like to catch them. Then keep the recievers in your back pocket or next to your bed. You will know the ripper is there. But the ripper will not know you know it yet. This giving the ripper time to do damage. Ripping plants by the roots does not take long. So make good decisions. I take no chances for I grow with naighbors knowing. You never know who they tell. So I sleep with my plants in a camper van parked right in my back yard feet from my plants. So I keep the alarms on low and under my pillow. I sleep with my shoes on until first day light. This driveway alert system uses a wireless receiver in your home will chime when the infrared driveway alert sensor outside detects motion, so you’ll be prepared for that unexpected knock at the door or beep in your driveway. This driveway alert's wireless motion sensor mounts outside on a post or wall, and you can set the receiver anywhere in your house (within 200 ft. of the sensor). Completely wireless installation Weather-resistant plastic housings Mounting hardware included This system will let you sleep at night. Please everyone get one.