Easy to Use: Using this product is very simple. It needs to be used with batteries, plug and play. Red wire connects to the positive battery terminal; the green wire connects to the negative battery terminal; the yellow and pink wires carry AC input and connect to the magneto coil.High Quality: It is stable and durable. Using high quality aluminum as the case, it is very sturdy and not easy to rust. It provides excellent protection and effectively protects the internal electronic components from the challenges of daily use, and is a perfect blend of protective performance and heat dissipation efficiency.Widely Applied: Universally suitable for motorcycle, boat motor, atv, dirt, bike, go kart, scooter, etc. with CG125-250cc and GY6 engines. Outputs approximately DC14.5V to charge 12V lead-acid batteries, power 12V light bulbs, etc. The rectifier is supplied with a wire adapter connection cable. The mounting hole is 2.17 inches (55mm).Safety Guard: The regulator rectifier is designed with a heat sink for better heat dissipation and longer service life. It stops charging the battery when the battery power is 100%, preventing the battery from being overcharged, which leads to a decline in battery life. Provides sufficient safety.Main Function: This rectifier is an electronic component that converts AC power to DC power and keeps the output voltage stable. The main function is to prevent the motorcycle battery from overcharging, further saving and stabilizing the current and improving the charging capacity. It also reduces noise in the circuit and protects the circuit.