Features: This double channel electronic controller module features onboard 2x3W digital power amplifiers for precise sound adjustment, enabling increase, decrease, and mute functions with seamless integration for external music amplifier boards. With an attenuation ranges of 0 to -79dB, it operates on 3.3-5V voltages, boasts low noise (SNR >100dB), stereo separation >100dB, and channel control for high fidelitys music output. Ideal for music enthusiasts, hobbyists, and manufacturers integrating into portable speakers, car music systems, or multimedia peripherals for enhanced stereo experiences. Perfect for use in wireless microphones, bluetooth-compatible sound devices, desktop miniature speakers, home theaters, and automotive music setups to deliver clear, powerful sound amplification. Its compact design allows easy embedding in space limited applications, providing versatile, low distortion music control for wide ranges of electronic projects. Specifications: Component: PCB Size:Approx.38x21mm/1.5x0.83inch Working voltages: DC3.3V~5V Attenuation ranges: 0 to -79dB, Stereo separation:>100dB control function: 2channel can be adjusted individually Equipped with power amplifier chip: 2x3W Option Type:1pc,3pcs; Applicable scenarios:music projects,home music systems,portable music equipment, Package Includes: Package A 1pc Sound Control Module Package B 3pc Sound Control Module note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.