1. Battery voltage protectionThis automatic circuit board module features a battery voltage protection that automatically disconnects the load when the battery voltage reaches the set value. This prevents over discharge and extends the battery life. 2. Dual power supplyEquipped with overcharge, over discharge, and overcurrent protection, this power switch module enables seamless switching between power supply and battery power. When the adapter is plugged in, it acts as the power source (green light on), and switches to battery power (red light on) when the adapter is turned off. 3. Reliable and stable performanceWith advanced manufacturing technology, this power regulator ensures reliable and stable performance. The screw terminal design provides secure and firm connections. 4. Wide applicationSuitable for various settings, including incubators, computers, and networks, this power switch module operates with the same input and output voltage. It can also continue to charge the battery when mains power is available.