Sunnytech 1PC Solar Power Swimming Pool Automatic Pond Sea Floating Ball Leds Sense Light New (color-changing) Notice:Please put the switch button at "on" position before use it. You can use a Pen to stick the button if you feel hard to press it on. Lights Come On Automatically at Dusk, Waterproof. No wiring or additional power supply, easy to install, On/Off Switch. The new ultrasonic sealing waterproof design! Lighting For Garden/Outdoor/Patios/House Yard/Pond/Reservoirs/Lakes/Parks