Description/Enhance your audio experience with our HiFi Headphone Amplifier, designed to drive headphones ranging from 16-150 Ohm. This compact yet powerful device offers adjustable amplification to suit your listening needs. Universal Compatibility: Comes with a 3.5mm jack cable, making it perfect for a wide range of mobile phones and music players. Portable Design: Its and portable design makes it easy to carry, ensuring you can enjoy high-quality audio wherever you go. Easy to Use: Simply plug in and play with no complex setups or installations required. Input/Output Port: 3.5mm Audio Port Distortion: 0.004% : 2120dB Load impedance: 16-150Ω Max. Power output: 250mW in Impedance 16Ω Amp Internal Voltage: +4V Charging voltage: DC 5V Frequency response: 20Hz-20kHz(+3dB) Lithium-Battery capacity: 1000mAh Amp Using Time: about 6 Hours Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:Black Material:ABS Package Contents: 1 x Headphone Amplifier kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.