Review on 🐶 Mutovlin LED Dog Collar - Bluetooth APP, Multi-Color RGB Light Up Collar, USB Rechargeable & Waterproof for Night Safety by Elizabeth Smith

You can switch between colors and modes by repeatedly pressing the button on the collar. Going through the application, you can get different shades and brightness. You get solid, flashing or auto-fading colors. It's quite bright. I don't use it that often and charge it once a week. The waterproofness is a bit questionable. There is a small flap without seals for the USB charging connection. Then place a 3/4 inch wide plastic rubber band across the door to seal it. Should be fine for light rain but I would take it off for a swim or play tubing. The adjustment buckle is a bit slippery, so I used a rubber band to keep it from slipping off gradually.