HiLetgo TDA7492 D Class High Power Digital Amplifier Board AMP Board 250W with Radiator With 4 model GAIN parts, can auto work on different voltage Short-circuit and over-temperature protection Phoenix connectors for easy speaker hook up Rechargeable lithium batteries that last 10-15 hours of continuous use. 12" stereo wiring harness included You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!