Features: This M273 amp Board, featuring the PT2399 and NE5532 op amp for seamlessly vocal and music blending. With independent control over music, microphone enhances singing experience. This versatiled karaoke board supports DC12-24V or AC5-12V power supply Compatibles various digital amplifier boards, provided the power voltages matching, ensuring convenience and flexibility in setting. For music enthusiasts, home entertainment users, karaoke lovers, and small event organizers enhances auditory performances and customization. Note：Compatible only with dynamic microphones; not suitable for condenser mics or headsets mics. Specifications: Item：M273 Amplifier Board Size:about 117x53MM/4.6x2.1in Chip: PT23999 Microphone input: 2 Knob Pitching: 24MM Mic Pitching: 17.6MM Output channel: 2channels Frequency ranging: 25HZ-17KHZ Features PT2399 chip and NE5532 op amp Supports DC12-24V or AC5-12V power supply Package Includes: 1PC M273 Amplifier Board note: Note：Compatible only with dynamic microphones; not suitable for condenser mics or headsets mics 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