K8 - built-in sound card, 3 power amplifier, receiver and effect device, birch solid wood material, 500W rated power, 14 neodymium magnetic speaker units, multiple audio effects (can be used at the same time), pure digital mixer (controllable, adjustable), 20000mHA battery (high temperature and low temperature resistance, non-flammable and explosive), fast charging, long duration (6-8 hours, Indoor 10 hours), support double OTG live, reverse power supply, support Bluetooth, U disk, AUX coaxial input (high sound quality), support series (all active audio series, can be the host auxiliary machine), 2 independent headphones monitoring, 2.4 inch LED smart display.