[Fosi Audio DA2120D is a mini Bluetooth 5.0 audio amplifier for passive speakers that features stereo 100 watt x2 2.1 channel power amp DA2120D equipped with integrated Bluetooth PC-USB coaxial optical 3.5mm aux inputs with a remote control to switch volume basstreble and modes to enjoy hi-res music 2-in-1 High-Performance DAC Power Amplifier with Multiple Input Modes. DA2120D installed in a quality aluminum enclosure support Bluetooth/RCA/PC-USB/Coaxial/Optical Input easy installation to build a stereo sound system DA2120D Bluetooth 5.0 amplifier delivers sound in sync so you can enjoy the freedom of wireless and high-fidelity streaming music. It reduces delay and improves the end-to-end speed of the audio transmission resulting in high-quality synchronized sound so you never miss a beat. With a 6dBi high gain antenna for long-range streaming up to 65 ft(20m) What You Get: DA2120D stereo amplifier x1 Bluetooth antenna x1 DC 24V power supply x1 Remote control x1 PC-USB Cable x1 Optical Cable x1 3.5mm to RCA Cable x1 User manual x1]