Description: Sound quality is very good by using this module. Two-channel stereo, 2x100W power output. Applicable speaker impedance: 4/6/8 ohm(8 ohm is the best). Operating voltage: DC 15-34V Recommended power: 24V voltage output, current above 5A Efficiency: 90% Number of channels: two-channel stereo Size: Approx. 90x 62mm/ 3.54x 2.44inch Package Includes: 1 Piece TDA7498 Digital Power Amplifier Note: 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