100 - level dimming to meet the requirements of plants and pets for light.At the same time, both open and close use the gradient mode to reduce the effect on fish. Timer switch, the different brightness switch of nature. Combine the timer and the dimmer into one. Check the interface of the lamp (5.5mm DC), and connect the in series between the lamp and the power supply. Sunrise and Sunset: Our 24-hour aquarium light timer simulates sunrise and sunset. Adjust the light brightness freely to give your fish a regular lifestyle. LCD screen: Ultra-thin LCD screen with a viewing angle of up to 180 degree (horizontal and vertical) for a viewing area. The brightness of the display is even and soft, which does not affect your eyesight. Compatibility: Our aquarium lamp dimmer is suitable for most of aquarium lights with inputs and outputs of 12-24 V. Applicable power range: 3-100W PWM frequency: 39K Memory: The internal memory stores its pre-programmed settings in the event of a power failure. Adjustable brightness: Compatible with 5.5mm female x 2.1mm male power connectors, can also be used as a dimmer, the brightness can be adjusted from 1 - 100%. Colour: Black Material: Plastic Size: 15x9.5x3.5cm Package Contents: 1 * Aquarium Lights Timer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.