<ul><li>Feature</li><li>supply: DC9-19V</li><li>The amplifier chip is a op amp NE5532</li><li>This circuit can be used when the sound of your device is small when connected to the amplifier. It is suitable for small audio signal amplification, the amplification factor is 10 (20db), and the front 3.5mm interface can be connected to headphones;</li><li>Input and output are 3.5mm headphone or</li></ul> Size: 87 x 50 x 37MM Colour: Black material: plastic Contents: 1 x Audio Switch Switcher Only the above content, other are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.

Pasotim AU-10X NE5532 Audio Signal Preamplifier Headphone AMP Board Gain 20Db 3.5MM Volume Control Tone DC 12V