Features: Industrial-grade LED display digital tube that can be easily detected at any angle and light. This item suitable for products at 36v DC input and power less than 100w products, such as fans, lights, wave pumps Simulate sunrise sunset to reduce stress in aquarium fishThis timer features two modes, one with a 15-minute ramp up/dim down, the other is simply on/off Be used as a dimmer, it can be adjusted from 1 100% brightness to meet the requirements of various plants and pets for light One button switch on/off Do NOT plug in any items if they exceed the rating of the 30 V or 120 W Suitable for all chihiros LED lights, A serials, A plus serails, RGB Serials, C Serails Installation: Before the installation, confirm the power supply and power of the lamp, which is lower than 100W. Check the interface of the lamp (5.5mm DC master lock), and connect the modulator in series between the lamp and the power supply. Step 1: Open the package and remove the dimmer. Step 2: Connect the dimmer to the LED lamp. Step 3: Plug in the power to automatically turn on the dimmer. Step 4: Set the dimmer parameter. Key Function : 1. ON/OFF Switch the light on/off. Long press for setting current time, by pressing + and - adjusting hours and minutes. Press Mode to exit time setting. 2. MIN/L+ Brightness increased 3. HOUR/L- Brightness decrease 4.MODE Press and hold 3 seconds to enter into the programming mode.The display will flash between no-1 and the current time,press+and - to adjust. Press MODE key again for setting the brightness. Press MODE key again, the display will flash between no-2 and the current time. Press MODE key again for setting the brightness. Press MODE key again to enter into the next timed program,it can control and seprate timing programs In this way, 8 sets of data are set. Press MODE to exit after setting.Notice: If the time is set to -- : --, the data on behalf of the group does not work. Specifications: Material: Plastic Model: S2-pro Product connector: 5.5mm DC male with lock thread. Product size: Length 7cm/2.76in; Width 3.9cm/1.53in Quantity: 1Pc(other accessories demo in the picture are not included) Note:1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes(without retail package): 1Pc x Light Dimmer Controller