We purchased a Watchman and a Sentinel - received them on Friday 5/6, installed them both on front lawn Saturday as we are having an influx of Bennetts Wallabies (small kangaroos?) eating our front lawn, flowers and shrubs. We live in a outer Hobart suburb close to a bush area but the bush area is being taken over by residential buildings, moving the animals from their natural habitat. Watching the security cameras and seeing the animals approach and then depart quickly proves both products are working as they should (or even better). As I was setting them up I walked in front of the Sentinel then copped a spray of cold water, proving it works as it should. Great products, may buy more - excellent service from EnviroBug. Pricing great too. Thank You