HiLetgo TDA7492P 50W+50W 250W Wireless Bluetooth CSR4.0 BT 4.0 Audio Receiver Digital Amplifier Board AMP TDA7492P 50W+50W Wireless Bluetooth TDA7492 digital amplifier chip, designed to optimize the circuit layout. Using CSR8635 Bluetooth chip, Bluetooth V4.0, high software compatibility. DIP switches can be adjusted directly after the amp gain more respect and better promote greater damping horn. Power supply: 2.1 interface DC 8~25V power supply 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!