Fosa Audio HiFi Amplifier Mini HiFi Stereo Headphone Earphone Power Amplifier AMP 3.5mm AUX Digital Audio Player with Rechargeable Lithium Battery for Smartphone Car Audio Outdoor Speaker

Description: This HiFi headphone amplifier, delicate, compact, lightweight, and portable, can improve your smartphone sound quality, making it possible for you to enjoy HD clear pure stereo sound without distortion. You're worth it! 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)1 x HiFi Amplifier (Not including charging cable) Note: The headphone amplifier ONLY improves sound quality, can NOT increase volume.