Method of installation: 1: opening the box, take out the lights and transformer; 2: check whether the lighting is good; 3: push the sucking disk on the smooth plane; 4: plug the transformer in the socket. Feature: Material: ABS material Waterproof: IP68 waterproof 4 super strong suction cups at the bottom 8-10 hours of long-lasting lighting 36 LED bulbs in multiple colors 180 degree adjustable DC 12 V operating voltage, safe and reliable for humans and fish Specification: Output: DC 12 V Input: AC110-220V, 50/60Hz Power: 3.5W/Light Item height: 3.75in (manual measurement, please note that there are some errors) Item diameter: 2.75in (manual measurement, please note that there are some errors) Not supported: remote control Package includes: 4* power cord 4* LED Underwater light Tips: 1,The indoor environment is recommended. if used in outdoor environment, please adopt waterproof measure for the transformer 2,when using this product, mild hot is normally Attetion: White(Composed by Red, Green, Blue, lights, not pure white)