Features: 1.Combine the timer and the dimmer into one. 2.With 8 sets of for time brightness Settings, timer switch, simulate the different brightness switch of nature. 3.Simulate sunrise & sunset to provide a natural day and night cycle for your fish. 4.Automatically turns your aquarium lamps on and off as you set. 5.Can also be used as a dimmer, the brightness can be adjusted from 0~. Cautions: 1.Use only the power supply from accessory with AC 100-240V input; for DC 5V-30V. 2.This device is NOT waterproof. Specification: Material: ABS&Electronic Components Color: Black Product Size: 6.8cmx 6cm x1.5cm Wide range voltage input: DC5V-30V Sunrise and Sunset models: 90 Minutes 12/24 Hours Options Maximum power 150W Quantity: 1Pc(light and other accessories demo in the picture are not included!) Note:1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes(without retail package): 1Pc x Light Dimmer Controller