This headphone amplifier DIY kit adopts NE5532 operational amplifier, which can ensure good sound quality.

Features:
Adopt NE5532 operational amplifier.
Play with good sound quality.
Wide range for input voltage: DC9V-18V.
Standard 3.5mm audio input/output interface.
With rotating knob for volume adjustment.
Components can be well protected by the transparent housing.

Specifications:
Quiescent Current: 6mA
Power Supply: DC9V-18V(Recommend 12V)
Audio Input/Output Interface: 3.5mm
PCB Board Size: 60 * 40mm / 2.36 * 1.57in
Finished Product Size: 70 * 50 * 22mm / 2.75 * 1.97 * 0.87in
Product Weight: 64g / 2.23oz
Package Size: Approx. 10.5 * 7 * 2.5cm / 4.13 * 2.75 * 0.98in
Package Weight: 74g / 2.63oz

Note:
This is a DIY kit, you need to solder it by yourself.

Package List:
1 * DIY Headphone Amplifier Kit with Transparent Housing
1 * User Manual(English)