Please read carefully before buying 1. Compatibility-Our aquarium dimmer is suitable for most aquarium lights with input and output of 12-24 V. -Applicable power range: 3-100W 2. This fish tank light timer cannot be used for ocean fish tanks 3. Do not exceed the voltage and power range during use. Input voltage: 12v 24v Output voltage: 12v 24v Power: 50w 100w 4. Cannot be used in constant current alternating current Description: 1.100 level dimming to meet the light requirements of various plants and pets. At the same time, use gradient mode to turn on and off to reduce the impact on fish. 2.Timing switch, simulating different brightness switches in nature. Combine the timer and dimmer into one 3.Check the interface of the bulb (5.5mm DC master lock), and connect the modulator in series between the bulb and the power supply 4.Sunrise and sunset - our 24-hour aquarium light timer simulates sunrise and sunset. Adjust the light brightness ly to make your fish live regularly. 5.LCD screen - ultra thin LCD screen with a maximum viewing angle of 180 degrees (horizontal and vertical) and a wider field of vision. The brightness of the display screen is even and soft, which will not affect your vision. 6.Compatibility - our aquarium light dimmer is suitable for most aquarium lights with 12-24 V input and output. 7.Applicable power range: 3-100w 8.The PWM frequency is 39K 9.Memory - when a power failure occurs, the internal memory stores its preset settings 10.Brightness adjustable - compatible with 5.5mm female X 2.1mm male power connector, can also be used as dimmer, brightness can be adjusted in the range of 1-100%