Features: brand new and high quality Apply For: 6-60V MAX 80V battery. 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. 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. Setting Error:Energized state while holding down the start / stop button, digital display 888, which is the factory setting. Use: In the setting voltage value, start button for play button raised, about stop button role to down for key. Specifications: Input Voltage : for DC 6-60V Display Accuracy: 0.1V Control Accuracy: 0.1V Output Type: direct output Voltage Tolerance: ±0.1V Apply For: 6-60V MAX 80V battery Dimension: approx. 81x54x18mm/3.19x2.13x0.71in Package Includes: 1 x Digital display Lead acid Battery Charge Control Module note: Please allow 1-2cm measuring deviation due to manual measurement. Due to the monitor difference and light effect, the actual color of the item may be slightly different from the color shown on the pictures. Thanks!