(1) improve energy and fuel consumption (2) Improve sound quality and light (3) reduce emissions, save energy and protect the environment (4) quick installation, special for cars Longer Battery Life: The battery life be longer after the charger current is stable and taken out of the battery, otherwise the high current and low current before installation cause great damage to the battery. (Generally it can be extended by 1-3 years) module is 5-10 years) 1. Increase engine power to make throttle response lighter and more sensitive 2. Improve the low-speed driving phenomenon and make the shift more stable 3. Improve ignition performance to make fuel combustion more complete 4. The spark plug supplies each cylinder evenly to make the engine run smoother 5. Reduce idle jitter and more stable 6. Reduce clutter distortion and improve the sound quality of your vehicle audio system 7. Protect the battery and circuit of thevehicle, reduce the load and extend the service life Reduce car start time Colour:as shown Material:Metal Package Contents: 4 x Automotive rectifier(16V100F) Only the above package content, other products are not included. Note: Light reflection 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.