1. DIY a voltage Regulator, with constant current function, Short-circuit proof, can protect the load. 2. It can power supply for electronic devices. 3. Charging indicator: charging red, bright green when fully . Turn lamp is the output current detection. 4. charger for all kinds of batteries, with MPPT function, can enhance the charging current to double. With a constant current and prevents battery overcharge, effective protection of the battery. 5. it can support high-power LED. As a car power supply , it can for your cell phone or digital products supply. 1. Module Name: 5A buck constant voltage constant current MPPT 2. Module Properties: Non-isolated buck module (BUCK) 3. Input voltage: 6-36V 4. Output voltage: 1.25-32V continuously adjustable (the default output 5V). MPPT voltage setting range: 6-36V 5. Output current range: 0.05-5A (The default output current is 3A) 6. Turn lights output range: 0.01-5A (default turn lamp current 0.3A) 7. Operating temperature: -40 to + 85 degree 8. Operating frequency: 180KHz 9. Conversion efficiency: up to 95% (efficiency, input & output voltage, current and pressure-related) 10. Over temperature protection: (automatically shut off the output after overtemperature) 11. Input reverse polarity protection: None, (if necessary, please add into the diode) 12. Output anti-anti-irrigation protection: no, the output must be connected to the battery plus blocking diode, otherwise it burn the module! 13. Installation: 4 pcs 3mm screws 14. Connection: IN is the input, OUT is output 15. Module dimensions:60 x 31 x 22 mm(without meter) Note: Detection module, please do not direct connect the output of negative electrode and the input of negative electrode colour:Blue Material:plastic size:60 x 31 x22mm Package Contents: 1 x Digital Solar Panel Controller Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.