Aqueon Betta LED Light

3 Modes of Illumination: Blue only, White Only, All On For use with Micro-USB-B Cable or three AAA batteries (both options sold separately) When using Micro-USB-B cable power is constantly on; when using batteries there is an 1 hour auto off feature, Light can rest on top of aquarium with clear lid, use legs to elevate the lamp over a clear lid or use the clamp. For use with aquariums with clear lids.