10-level dimming to meet the light requirements of plants and pets. Turning lights on and off gradually reduces impact on fish. Time switch combines timer and dimmer functions. Suitable for most fish tank lights with input and output of 12-24V. Adaptation Voltage: 12-24V Applicable Power Range: 3-100W Adaptation Type: Single-channel lamps Product connector: 5.5mm DC male with lock thread Functions: 1. Timing 2. Four sunrise and sunset modes 3. Ten-level brightness adjustment Notes: 1. This aquarium lamp timer is not suitable for saltwater aquariums. 2. Do not use with AC (alternating current) power sources. 3. Do not exceed the specified voltage and power range during use. 4. The timer is not waterproof; keep away from water and damp locations. 5. Ensure the working voltage matches the timer's specifications. 6. Do not touch the timer with wet hands. 7. Turn off the power before performing any maintenance. 8. If the product is not functioning properly, have it repaired by a professional. 9. If the product falls into water, immediately disconnect power and dry in a cool place. 10. Avoid prolonged exposure to direct sunlight. 11. This product is not a toy; keep out of reach of children. Input voltage: 12V - 24V Output voltage: 12V - 24V Power: 50W - 100W To set current time: Press R key and on/off key simultaneously for 2 seconds, then use +/- buttons to adjust time. Color: Black Material: Plastic Package Contents: 1 x LED Light Dimmer Controller Note: Light reflection and display differences may cause slight variations between the item color in images and actual product. Measurement error allowed is +/- 1-3cm.