<p>1. 16-300\u03A9 Mini HiFi headphone amplifier, It is delicate, compact, , and portable that it can be carry conveniently.</p> <p>2. 3.5mm AUX input and output, SNR 100Db and +N 0.0003%, possibility to output not just louder sound, but a and more real stereo sound without distortion.</p> <p>3. Two-stage gain switch enhances the signal input into the amp circuit for optimal performance of the headphones</p> <p>4. Aluminum matte , fashion design provides you a comfortable handheld feeling while the aluminum matte makes it .</p> <p>5. Rechargeable lithium battery, it adopts a rechargeable lithium battery with 1000mAH capacity, which allows it to stay working more than 8 hours.</p> <p>Universal compatibility, it can remarkably compatible with a of digital devices, such as MP3 MP4 mobile phone computer.</p> <p>HiFi headphone amplifier, delicate, compact, , and portable, which convenient to carry, can output sound without distortion.</p> <p>Lithium battery capacity: 1000mAH</p> <p>Amp using time: more than 8 hours</p> <p>Amp battery voltage: DC3.7V - 4V</p> <p>Amp internal working voltage: \u00B14V</p> <p>SNR 100Db</p> <p>+N 0.0003%</p> <p>Output Power: 40Mw in Impedance 16\u03A9</p> <p>Adapted Headphone Impedance: 16-300\u03A9</p> <p>Dimension: 95 x 52 x 13mm(L x W x H)</p> <p>Color: Black</p> <p>Material: ABS</p> <p>Package Contents:</p> <p>1 * Headphone amplifier</p> <p>1 set * accessories</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>