The Ahuja 50W 50-15,000Hz ± 3dB Amplifiers with Bluetooth & USB Option DPA-570M is an ideal choice for IT and electronics. With 3 mics and 1 aux input, the amplifier enables you to enjoy your music with ease. The built-in MP3 player with an USB reader and remote control adds to your convenience. The line output allows you to connect the amplifier to a booster amplifier. The active bass and treble controls give you the perfect sound experience. It supports the instant transfer of AC power to DC power in case of power failure. The main function of a Bluetooth amplifier is to convert headphones with wires into wireless Bluetooth headphones by using the radio frequency communication attribute of the Bluetooth technology. The impedance is perfect for converting a regular speaker to a Bluetooth speaker.