Features: Main volume, for echo and microphone volume adjustment, treble & control are designed to satisfy different listening styles and audio devices. All adjusted by the analog components to upgrade the sound quality, allowing you to for play the music world and give you the real high-quality sound effect. Light weight and easy to carry, convenient to cleary show the working status in real for time and easy to operate. High quality for case, stylish appearance, add a cool landscape to your livingroom, very suitable for home/car/party audio system use. Professional Audio Supplies:High cost performance digtial power amplifier module,giving you an unforgettable auditory experience. High quality material made,durable and portable acoustics module for home/party. This audio module for most audio devices such as for smart phones, tablet, computers etc. or audio storge devices. Specifications: Material:Plastic Max Output Power:50wx2+100w Audio Module Size:Approx.9.4x9x2.2cm/3.7x3.5x0.8in Bluetooth-compatible Version:5.0 Subwoofer Frequency:20-200HZ Package Includes: 1 Piece Acoustics Module note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.