To operate, simply connect the module to the battery and , ensuring proper polarity. The delay relay controller board enhances user convenience by preventing sudden , which can damage components during the charging cycle. Features -Color:Assorted Color -Material:Plastic -Size:5.10X2.60X1.40cm/2.00X1.02X0.55in -Charging: with a constant 5A current, this module drastically reduces the charging time, allowing you to stay productive and connected without interruptions -Robust safety mechanisms: the unit comes equipped with critical protections such as safeguards to enhance user safety -Designed for led: this power module for driving led, ensuring a stable current output that contributes to extended product life -Versatile functionality: suitable for an extensive range of batteries, this module meets diverse charging needs across various devices and applications -Interface: the userfriendly design facilitates quick setup, making it an ideal choice for users needing reliable Package list: 5 x Voltage Relay Module