Item Type: Headphone Amplifier <br>Material: Aluminum Alloy <br>Color: Black <br>Battery Type: Built in 1080mAh Lithium Battery (Included) <br>Input: 3.5mm/0.1in <br>Output: 3.5mm/0.1in <br>Headphone Impedance: 16Ω-600Ω <br>SNR: -120dB <br>Distortion: 0.00022% <br>Applicable Devices: Perfectly Compatible with MP3, MP4, Mobile Phones, Computers and Many Other Digital Devices1、[Two Stage Gain Switch] Headphone amplifier with high and low gain switch for premium headphone performance. Plug and play, easy and fast to use. <br>2、[3.5mm AUX Input And Output] Load impedance 16Ω to 600Ω. Not only for larger sound, but also for clearer, more lifelike stereo sound without distortion. <br>3、[Aluminum Alloy Material] Stylish design of the headphone amplifier provides a comfortable handheld feel, while the brushed aluminum surface makes it durable. <br>4、[Rechargeable] The headset amplifier is powered by a rechargeable lithium battery with a capacity of 1080mAh, giving it a working time of over 8 hours. <br>5、[Compatible] This headset amplifier is perfectly compatible with a wide range of digital devices such as MP3, MP4, mobile phones and computers.It is not recommended to use it while charging, as charging will produce current interference and may generate noise.1 x&nbsp;Headphone Amplifier<p><p>1 x Sound Cable</p><p>1 x Data Cable</p></p>