• Donner Bluetooth stereo audio amplifier with 4 independently controlled channels. • Peak power of 440W (110W x 4) for 4 groups of 8 speakers with 4-8 ohm impedance. • Multiple input modes: Bluetooth, USB (maximum 32G), SD card (maximum 16G), RCA, microphone, AUX, and FM radio. • Upgraded Bluetooth 5.0 for greater stability, sound quality, and usage distance. • Dual 1/4'' microphone interfaces to customize karaoke nights, events, or presentations. • HD LED display with FM antenna and remote control included.