1Start charging voltage and stop charging voltage can be freely set, automatically cut off power to save power and extend service life of battery 2The board has a bright 3-digit display with 0.1 accuracy shows the setting value 3Start or stop according to the set value, and monitor real-time voltage, to effectively protect storage battery from overcharge 4Big power screw terminals with large capacity can meet many wiring requirements, maximum withstand voltage 300V, current 20A 5Suitable for 220V charger and control charging storage batteries of 12V, 24V, 36V, 48V, 60V, 72V, 84V, 96V, etc