Description: Built-in TPA3116 amplifier chip, this is a pre-amplifier, bass frequency processing, with bass volume potentiometer control of the bass amplifier board. The amplifier board can support 100W bass channel, 50W left channel and 50W right channel three-channel output. Wide operating voltage, power-saving design, the amplifier board efficiency is up to 90%, which can use a good switching power supply, notebook computer switching power supply, and also use a charging bottle or car power supply, etc. Made of acrylic plastic and high density fiber board, the amplifier board is durable and and sturdy. There are one size, the length is 11.5cm, the width is 11.3cm, the height is 3.3cm. It supports bluetooth-compatible audio receiving, external audio source input interface, with preamplification, bass frequency division processing, bass volume, bass frequency, left and right channel volume, treble, function control switch/total volume, 5 adjustment potentiometers. Item Name: Digital Amplifier Material:Acrylic,Fiberboard Type: Musical Instrument Compatible Models: TPA3116 Power Supply: DC 12-24V Output Power: 100W, 50W Operating Frequency: 20Hz-20KHz Sensitivity: 600-800mV Size:11.5cmx11.3cmx3.3cm/4.53inx4.45inx1.3in Notes: 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. Package Includes: 1 X Amplifier Board