Yangjie GBP301 is a passive network audio amplifier with an integrated Bluetooth receiver. It supports a variety of input signal orphases, allows flexible connection with amplifiers, loudspeakers, and other audio systems, and can be used as a 3-in-1 function of playing Bluetooth music, FM radio, and audio input aux. It also has a built-in Ti LP7521 switching power supply chip, supports 500W of peak power output, and has an output subwoofer with a terminal. It also has a built-in echo cancellation and noise reduction algorithm to enhance the sound quality of wireless playback. It has a minimalist design with black, white, and red finishes available.