Ⅰ. 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. Ⅱ. Time switch, which combines timer and dimmer into one. Ⅲ. Suitable for most fish tank lights with input and output of 12-24 V. Ⅳ. Adaptation Voltage: 12-24V Ⅴ. 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 Ⅵ. 1. The aquarium lamp timer cannot use for sea aquarium Ⅶ. 2. It cannot in AC(Alternating current), do not use it on lamp Ⅷ. 3. Do not exceed the voltage and power during use Ⅸ. Input voltage: 12v - 24v Ⅹ. Output voltage: 12v - 24v Ⅺ. Power: 50w -100w Ⅻ. 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 ⅩⅢ. 2. Do not exceed the voltage and power range during use. ⅩⅣ. 1.The timer is not waterproof, please keep away from the water and the damp position. ⅩⅤ. 2. The working voltage must be compatible with the voltage specified by the timer. ⅩⅥ. 3. It is strictly forbidden to touch the timer with wet hands. ⅩⅦ. 4. Please turn off the power before maintaining the timer ⅩⅧ. 5. When the product is not in normal use, it should be repaired by a professional. ⅩⅨ. 6. If the product accidentally falls into the water, please turn off the power immediately and dry it in a cool place. ⅩⅩ. 7. Do not expose this product to exposure to the sun. ⅩⅪ. 8. this product is not a toy, please from children. ⅩⅫ. 9. if you have any question, please contactus ⅩⅩⅢ. Color: Black ⅩⅩⅣ. Material: plastic ⅩⅩⅤ. 1 * LED Light Dimmer Controller ⅩⅩⅥ. Only the above package content, other products are not included. ⅩⅩⅦ. 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.