1. After the controller is powered on, it first identifies the type of battery voltage. If the battery voltage is 18V, it is recognized as a 12V system. If it is above 18V, it is recognized as a 24V system 2.After identifying the system voltage, the user can aim the remote control at the infrared receiver, press the desired battery type, and the blue light will flash. The setting is completed without the need for a restart. 3. After setting battery type,select working mode of the load.system (24H) is in the normally open mode of the load,mean that the load output is directly powered on (unless low battery protection),light control () indicates that the load is turned off during the day and turned on at night,and 1-13 indicates that load is turned on at night and delayed for 1-13 hours before turning off.One of last 2 mode is used for solar lighting systems,which can achieve unmanned automatic monitoring&control 4. When it is necessary to temporarily turn on or off the load, press manual (H), enter manual mode, and then press 0N/0FF to manually switch the load. It is generally used to test whether the connection of the load is correct<br><br>This controller supports three types of batteries, namely 2V lead-acid batteries (including maintenance free, open type, type, etc.) V lithium-ion batteries (3 strings, . 3 x 3.7V, including capacity type and power type) 12.8V lithium iron phosphate batteries (4 strings, . 4 x 3.2V). If it is a 24V system, it corresponds to 24V lead-acid batteries (including maintenance free, open type, type, etc.) 22.2V lithium-ion batteries (6 strings, . 6 x 3.4V, including capacity type and power type) 25.6V lithium iron phosphate battery (8 series, . 8 x 3.2V) Material: ABS colour: Black<br><br>Package Contents: 1 x Solar Control Regulator<br><br>Only the above package content, other products are not included. 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.