EF002 16-150 Ohm Headphone Amplifier Adjustable Audio Amp With 3.5mm Jack Cable

1. Aluminum matte surface, exquisite appearance2. 3.5mm AUX in and out3. Support 16-150Ω impedance, can output excellent sound quality without distortion.4. High-quality audio, suitable for your mobile phone, MP3, MP4, laptop.5. Noise reduction function, enhanced dynamic distortion, perfect pure stereo effect, high-definition voice and music sound quality optimization.Specification:1. Input/Output port: 3.5mm audio port2. Distortion: 0.004%3. Signal-to-noise ratio: greater than or equal to 120dB4. Load impedance: 16-150Ω5. Power output (MAX): 250mW at impedance 16Ω6. Internal voltage of amp: +/-4V7. Charging voltage: DC 5V8. Frequency response: 20Hz-20KHz (+/-3dB)9. Lithium battery capacity: 600mAh10. Use time: about 6 hours11. Size: 9.5x6.2x1.5cm12. Weight: 160 grams