Features: Intelligent Battery charging Discharge Module with Auto Cutoff & voltages protections safeguards your batteries from over/under voltages via UL1/nL1 settings while enabling timed charging/discharging control and emergencies stop function. Features serials communication for real time relays statuses monitoring, customizable timer settings (OP), and auxiliary high levels signals output to synchronize external devices during operate. Ideal for battery maintenance professional, solar energy systems users, and electronic enthusiasts managing lithium/leads acid batteries in projects or equipment upgrades. Perfectly integrates into home energy storage systems, electric vehicle charging stations, and industrial power backups requiring precise voltages regulation and automated power management. Engineered with reverse connection protections and six operate mode (U1-U6) to handle complex scenarios like interval based relays activation, ensuring compatibility across diverse battery types. Specifications: Component: Circuit Board Supply voltages: DC6-40V, voltages detection ranges:DC0-60V, suitable for various batteries below 60V, voltages test error ±0.1V charging and discharge time (OP) ranges: 0-999​​minutes. Features: Integrated voltmeter, with undervoltage and overvoltage protections functions Package Includes: 1pc Battery Charging and Discharge Module note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.