Description: Work modle: class D Quiescent current: 60mA Work efficiency: 90% Rated output power: 100W+2x50W Input mode: only bluetooth input function Specification: Frequency response: 20Hz to 20KHz Working voltage: DC18V to DC24V Maximum output current: 3A Material: electronic component Size: 11 x 11 x 3.2cm/4.33 x 4.33 x 1.26inch(after assembling) Module size: 10.4 x 10.3cm/4.09 x 4.06inch Package Includes: 1 Piece Amplifier 1 Piece Acrylic Box Kit Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test.Thank you