Audio amplifier hifi 4 chanel: built-in hifi power amplifier, the sound amplifying device is equipped with high-level audio outputs (pdm) and low-noise inputs. this allows you to enjoy your favorite music anywhere you go. Amplifier audio 1200w bluetooth 5: the built-in bluetooth speaker system allows you to listen to your favorite music, movies, and more without having to worry about setting up a power amplifier. High quality material: the amplifier is made of high-quality abs material, which is durable and has a long service life. it can be used for a long time. Usb interface: the usb interface is compatible with most usb devices, such as pc, laptop, computer, etc. Bluetooth: Maximum power: the amplifier has a built-in power cable, which can be connected to any computer or other devices with usb ports. Inbuilt cooling fan.