16-150 Ohm Hifi Headphone Amplifier 3.5mm Aux Input Jack Portable Adjustable Audio Amplifier For

Description: Product name: Headphone Amplifier Product color: black Input/output port: 3.5mm audio port Distortion: 0.004% Signal-to-noise ratio: 120120db Load impedance: 16-150Ω Maximum output power: 250mw at 16Ω impedance Internal voltage amplifier: 4 4v Charging voltage: dc 5v Frequency response: 20hz-20khz (33db) Lithium battery capacity: 1000mah Amp use time: about 6 hours Body size: 9.5x6.2x1.5cm/3.74x2.44x0.59in Power cord length: 95cm/37.4in Audio cable: 1m/3.28ft Product weight: 160g Why there is a buzzing/hissing noise: Please do not use it while charging, as it will cause current interference while charging. That's why there is noise. When fully charged, turn off the power and use the headphone amplifier This amp isn't loud enough for my big headphones. Why: This headphone amplifier supports headphones with an impedance of 16-150 ohms. Please check the headphone impedance Packing list: 1 x audio amplifier 1 x audio cable 1 x power cord 1 x instructions 1 x packing box Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.