Have dat "lights" on Hundegeschirr meies cat in use and am very satisfied. First had to change the batteries, because the were inside were down, but then came the great "enlightenment". Was the same with the cat out and was no longer able to hide and was widely visible even behind shrubs and bushes as I have the lights mounted on top of the dishes. The appeal is so up and is visible about 500 m, more ego have not tried it yet. Changing the battery is totally easy, simple gumming revolutionize lamp rausnehmen change battery and roll back inside. Making sure that the rubber again applied properly so dat lamp remains again protected from rain. Through the rubber flaps on both sides to dat lights läst easily befäßtigen on tableware, simply roll over the belt and the rubber does not slip dat part also. Can I recommend inexpensive and functional only!