Features 1、Has the function of automatically switching battery power supply after power failure, suitable for DC 12V, 24V, 36V, 48V. 2、Easy to use, when the DC power supply terminal has power, the power supply is preferred, and the battery power supply is automatically switched when the DC power supply terminal has no power. 3、The indicator light is on when the power adapter is powered, and the indicator light is off when the power is supplied, which is easy to observe. 4、Made of high‑quality materials, this module is sturdy, durable, not easy to wear, and has a long service life. 5、Using sophisticated production technology, this module has stable performance and can work for a long time. Specification Item Type: Battery Controller Module Product Model: YX-X804 Applicable Voltage: DC 12V-48V Load: 10A Product Size: Approx. 50 x 30 x 18mm / 2.0 x 1.2 x 0.7in Installed Size: 23MM (2 Holes L3MM) Package List 1 x Battery Controller Module