Use indoors or outdoors, these battery powered led lights can even be submerged. Use in ponds, waterfalls, aquariums, vases and more. They are powered by 3 x aaa batteries and are controlled via a remote control, there are 4 brightness levels, 16 colour options, and 4 colour change modes. Use to uplight, backlight, or create striking table decorations, with a diameter just shy of 7cm and thickness of just 3.5cm, it is a nice compact unit that can be discreetly incorporated into your projects. Colour change led uplighterbattery operated requires 3 x aaa batteries not included10 x colour change ledsremote controlled remote requires 1 x cr2025 batteries includeddiscreet mood lightingcolour change and static colour effectssubmersiblesuitable for indoor and outdoor usesize 7cm diameter x 3.5cm h