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. Single-channel lamp compatible. Product connector: 5.5mm DC male with lock thread. Functions: timing, four sunrise and sunset modes, ten-level brightness adjustment. Note: - This aquarium lamp timer is not suitable for saltwater aquariums. - Do not use with AC (alternating current) power sources. - Do not exceed the specified voltage and power range during use. - Input voltage: 12V - 24V - Output voltage: 12V - 24V - Power: up to 100W Instructions: - To set current time: Press R key and on/off key simultaneously for 2 seconds, then use +/- keys to adjust. - Do not exceed the voltage and power range during operation. Safety Notes: - This timer is not waterproof; keep away from water and damp locations. - Ensure working voltage matches the timer's specifications. - Never touch the timer with wet hands. - Turn off power before performing any maintenance. - If the product is not functioning properly, have it repaired by a professional. - If the product falls into water, immediately disconnect power and dry in a cool place. - Avoid prolonged exposure to direct sunlight. - This product is not a toy; keep out of reach of children. Color: Black Material: Plastic Package Contents: 1 x LED Light Dimmer Controller Note: - Other items shown are not included. - Lighting and display differences may cause slight color variation between image and actual item. - Measurement tolerance: +/- 1-3 cm.