1. Set the start voltage:Normal display voltage state, press to a starting voltage button ,to display the start charging voltage. long Press the start button, digital flashes, by start and stop button, set the start charging voltage value.2. Set Stop voltage:Normal Voltage normal display mode, press to a Stop voltage button ,to display the Stop charging voltage. long Press the Stop button, digital flashes, by start and stop button, set the Stop charging voltage value.3. Setting Error:Energized state while holding down the start / stop button, digital display 888, which is the factory setting.Input Voltage:DC 6-60VDisplay Accuracy:01VControl Accuracy:01VOutput Type:direct outputVoltage Tolerance:01VApply For:6-60V MAX 80V batteryUse: In the setting voltage value, start button play button raised, about stop button role to down keyMaterial:PC+ metalColour:bluePackage Contents:1 * Digital display Lead acid Battery Charge Control ModuleOnly the above package content, other products are not included.Note: Light 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.