1. The headphone amplifier board MAX4410 miniature amp can be used as a preamplifier instead of NE5532 2. MAX4410 is a low distortion, low voltage, low power consumption high-fidelity headphone amplifier chip, suitable for single-cell battery power supply 3. It can not only be used for headphone amplification, but also used as a power amplifier preamplifier; the performance is comparable to that of an operational amplifier preamplifier 4. One board with dual functionality: designed with 3.5mm headphone jack output and 2.54mm pin header output, selectable based on different needs 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 shooting and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement allows an error of +/- 13cm.