• Mini HiFi Headphone Amplifier - Compact, lightweight, and easy to carry
• 3.5mm Auxiliary Input and Output - 3.5mm audio port, signal-to-noise ratio>120dB, thd+n is 0.0003%, not only the output is louder, the stereo is more realistic, no distortion
• Aluminum Matte Surface - Stylish design gives you comfortable hand feel, and the aluminum matte finish makes it durable
• Rechargeable Battery - Using rechargeable lithium battery, capacity 1500mAh, can work continuously for more than 8 hours
• Strong Compatibility - Compatible with a variety of digital devices, such as MP3, MP4, mobile phones, computers (It is not recommended to use when charging, because there will be current interference during charging, which may cause noise)

Specification:

• Product size: 11.2*6.2*1.1cm
• USB cable length: 97cm 
• Audio cable length: 100cm
• Material: aluminum alloy