Audio Amplifier with 3.5mm Headphone Jack

Metal headphone amplifier with battery. Using a 3.5mm jack. This is a compact device that allows the user to amplify an audio signal in a simple, fast and practical way.
The device allows you to control the audio output intensity using a rotary knob and a H ( high) - L (low) gain selection switch.

Specs:

• Input/Output port: 3.5mm minijack
• Maximum output power: 130 Mw with 32 Ohm impedance
• Load Impedance: 16 - 300 Ohms
• Battery powered metal headphone amplifier.
• Charging voltage: 5v
• Battery life in operation: 6 Hours
• Frequency response: 10Hz - 40Hz
• Size: 94*52*13mm
• Distortion: 0.001%
• Weight: 75g