The aim AS301HPA is a portable headphone bass booster and amplifier. It is small but powerful enough to drive your headphones in the best performance, it also offers better bass enhancement. Just connect it between your MP3 player and headphones or earphones, you can get louder sound and better bass performance than before. Moreover, through aim AS301HPA, you can lower player sound output level, and extend the playback time of audio player. Enjoy the quality sound performance by this little device.

• Play time: 10hrs (output volume 10%).
• Charge time: 1.5-2hrs.
• Tiny bomb appearance.
• Improve total harmonic distortion (THD) and noise performance.
• No degradation of low frequency response.
• Two LEDs for charging and playback indicator.
• Increase 120% of original audio output level.
• Support 16ohms - 150ohms earphone.
• Built-in rechargeable Li-battery for at least 6 hours usage.
• Auto power on by inserting earphone jack.
• Small size with dimensions L45 x D23mm (L1.8” x D0.9").
• Mini USB connector for charging.
• Stereo line-in.
• Stereo headphone-out.
• Output: 50mW (32ohms load).
• SNR: 100dB; distortion: < 0.01% (35mW).
• Frequency response: 10Hz - 100kHz.
• On/off switch: by inserting the plug into the stereo output jack.
• Battery: built-in rechargeable battery, for 6 hours playback at 50% volume output.
• Charging: by mini USB.
• HP independence: 16ohms - 150ohms.
• Weight: 13g (0.45oz, include battery).