1. The headphone amplifier board features the MAX4410 miniature amplifier, suitable as a preamplifier 2. MAX4410 is a low distortion, low voltage, low power consumption, high-fidelity headphone amplifier chip, designed for single-cell battery power supply 3. It can be used for headphone amplification as well as a power amplifier preamplifier, delivering performance comparable to operational amplifier preamplifiers 4. Dual functionality design with 3.5mm headphone output and 2.54mm pin header output for flexible connectivity options 5. Working voltage: DC 3V12V, maximum output power: 80mW 80mW Color: Red Material: ABS Size: 50mm 25mm Package Contents: 1 Headphone amplifier board Note: Light and display differences may cause slight variations in color. Measurement allows an error of +/- 13 cm.