Features: The XH-M173 Karaoke Board, features the advanced PT2399 chip for exceptional auditory performances. This karaoke reverberation board requires Double AC12V power supply and connection seamlessly to your auditory source and amplifier It offers precise control with four adjustable knobs for music microphone sound, reverberationdepth, and time. For music enthusiasts, home entertainment users, KTV operators, and audiophiles enhances their auditory setting. Perfectly for a variety of setting including family gatherings, KTV room, corporate event, and school performances, providing versatiled Auditory solution. Specifications: Product Name:Karaoke Reverberation Board Product Model:XH-M173 Chip Model:PT2399 Output Load:Required rear amplifier board Power supply:Double AC12V Net weight:62g Product Size: about 100x57x17mm/3.94x2.2x0.7in Package Includes: 1PC XH-M173 Amplifier Board note: Due to light and screen difference, the item color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement