Portable High Fidelity Stereo Audio Quality HIFI Headphone Amplifier

1.Using this product can make the sound quality become much full and more stereoscopic,offering every user HiFi stereo auditory effect.

2.It is easy to operate,no need switch button,automatically detect the load startup,when there is the earphones of the output end inserted,it automatically turn on,if plugged out,it automatically turns off.

3.High-efficiency charging,generally speaking,charging 40 miniutes, HIFI will eork 5 hours,battery lift is up to 20hours.

4.The product is built-in protection function,when the voltage of the inner battrey is lower than 2.9V,it will automatically power off.

5.Circuit protection: battery protection, over-current protection, voltage protection, fast protection.

6.Low-distortion operational amplifier: No output capacitor, ground plane output, slow frequency, greater ripple. Internal impedance power design is low, making the sound more transparent, wider dynamic range or even better

7.Butterworth filter circuit: built-in Butterworth filter circuit, can compensate for the mobile music defects in the high frequency part of the dark and low frequency weaknesses, through the sound adjustment to reduce the sharpness and noise of mobile audio, improve audio quality.

Portable headphone amplifier is compatible with most headphones (best for impedance under 32 Ohms). It provides a powerful high-resolution audio experience through your headphones.
Specially designed for a wide array of digital devices such as cellphones, portable mp3 and iPod, which are naturally defective in low output impedance and low trust of audio output. With built-in USA high fidelity audio processing chip and patented audio processing technology, what you will hear is the highest quality music.

Features:
1.Positive and negative double power technology
Built-in single power supply circuit effectively suppress background noise, thus achieving a best stereo audio effect.

2.High frequency dynamic compensation tuning circuit network Built-in butter worth circuit design can make up these shortages of mobile phone music, such as the darkness of high frequency and weakness of low frequency.

3.Low distortion calculation amplifier
THD: THD+N is 0.006%
Free output capacitance,making the reference of ground level as the output design,the low frequency is surgent, the sound with the design of internal resistance power supply is much transparent and the dynamic range is better.Specifications

Please charge the product before using it! The charging color is red, and when the charging is full, the red light goes out.
If there is a situation where the use is not suitable or there is no amplified sound, please install the adapter and use it, thank you!

Package contents :
1 x Headphone Amplifier
1 x USB Charging Cable
1 x Headphone Adapter(3.5mm transfer 2.5mm)
1 x Headset Cable
1 x Conversion head
1 x English User Manual