Our Trackers are certified with IP65 rating. Unfortunately, it's not totally water proof right now. For IP65, according to the official explanation, it is : Dust-tight and protected from moisture challenges up to jetting water. That means it could resist water splash and dust. It enables us to use them in rain, hailstone, snow or storm, but it could not expose in the rain for a long time or immerse in the water . Please kindly take it off when your dog is playing in the rain or swimming in the water, it would get water damaged.