Features: Brand new and high quality. Applicable to: 6-60V MAX 80V battery. Set Stop Voltage: In normal voltage display mode, press the stop voltage button to display the stop charging voltage. Long press the stop button, the digital display will flash; use the start and stop buttons to set the stop charging voltage value. Set Start Voltage: In normal voltage display mode, press the start voltage button to display the start charging voltage. Long press the start button, the digital display will flash; use the start and stop buttons to set the start charging voltage value. Setting Error: When powered on, hold down the start/stop button; the digital display will show 888, indicating factory settings. Operation: When setting the voltage value, use the start button for up and the stop button for down. Specifications: Input Voltage: DC 6-60V Display Accuracy: 0.1V Control Accuracy: 0.1V Output Type: Direct Output Voltage Tolerance: ±0.1V Applicable to: 6-60V MAX 80V battery Dimensions: Approx. 81x54x18mm/3.19x2.13x0.71in Note: Please allow 1-2 cm measurement deviation due to manual measurement. Due to monitor differences and lighting effects, the actual color of the item may differ slightly from the color shown in the pictures. Thank you! Package Includes: 1 x Digital Display Lead-acid Battery Charging Controller Module