1. 10-level dimming to meet the light requirements of various plants and pets. At the same time, turning on and off the lights can reduce the impact on the fish. 2. Time switch, which combines timer and dimmer into one. 3. Suitable for most fish tank lights with input and output of 12-24 V. 4. Adaptation Voltage: 12-24V 5. 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 6. Note: 7. 1. The aquarium lamp timer cannot use for sea aquarium 8. 2. It cannot in AC(Alternating current), do not use it on lamp 9. 3. Do not exceed the voltage and power during use 10. Input voltage: 12v - 24v 11. Output voltage: 12v - 24v 12. Power: 50w -100w 13. 1. Star time and end time go ok, i cannot set the current time? R key and on/off key at the same time for 2 second, then +/- to set the current time 14. 2. Do not exceed the voltage and power range during use. 15. Note: 16. 1.The timer is not waterproof, please keep away from the water and the damp position. 17. 2. The working voltage must be compatible with the voltage specified by the timer. 18. 3. It is strictly forbidden to touch the timer with wet hands. 19. 4. Please turn off the power before maintaining the timer 20. 5. When the product is not in normal use, it should be repaired by a professional. 21. 6. If the product accidentally falls into the water, please turn off the power immediately and dry it in a cool place. 22. 7. Do not expose this product to exposure to the sun. 23. 8. this product is not a toy, please from children. 24. 9. if you have any question, please contactus 25. Color: Black 26. Material: plastic 27. Package Contents: 28. 1 * LED Light Dimmer Controller 29. Only the above package content, other products are not included. 30. 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.