Portable Amplifier, Mini HiFi Stereo Headphone Amplifier, 3.5mm AUX Input and Output, HiFi Sound for Mobile Phones, car Audio

Features: Mini HiFi Amplifier: It is delicate, compact, lightweight, and portable so that it can be carried conveniently. 3.5mm AUX Input and Output: 3.5mm AUX input and output, 95DB SNR and THD+N ?0.006%, make it possible to output sharper and more real stereo sound without distortion. Rechargeable Lithium Battery: It adopts a rechargeable lithium battery with 200mAH capacity, which allows it to stay working long time. Compatibility: It is specially designed for mobile phones, but also can be used to car audio, outdoor speaker and so on. HIFI Sound: Noise reduction function, and distortion with enhanced dynamics, perfect pure stereo effect, HD voice music sound quality optimization Specifications: Output power: Max: 300mw * 2 / 300mw * 2 / 300mw * 2 / 300mw * 2 / 300mw * 2 / 16? Frequency / response: 2-27KHZ 27KHZ Signal to noise ratio: 95DB Dynamic range: 90DB Separation: 70DB Distortion: ?0.00 6% Input impedance: 32 ? Output impedance: ? 200 ? Operating temperature: -40? ~ 60? Storage temperature: -40? ~ 85? Storage humidity: 10% ~ 90% Battery: Built-in lithium battery, 200mah (Charged by a Micro USB cable) Battery endurance: Approx. 30 hours Size: 70 * 25 * 10mm / 2.76 * 0.98 * 0.39inch Color: Gray (Shown as the pictures) Package weight: 40g Package List: 1 x HiFi Amplifier (Not including charging cable) Note: The headphone amplifier ONLY improves sound quality, can NOT increase volume.