You get 2 lights each with a remote. There is a power switch on the light too. It takes 3AAA batteries that last around 10 hours and are not included.These lights are not meant for long time use. Maybe to add color to a party or event but i would not use in a fish tank. Mine did not sink. The remotes work great.there are 16 different colors 3 movement modes (flash, strobe,fade,and smooth) and brightness control. #RankBoosterReview #Sponsored #LUXJET https://www.amazon.com/Submersible-Controlled-LUXJET-Waterproof-Centerpiece/dp/B075Q6LFQL