JTLB Guitar Headphone Amplifier - 500mAh battery Distortion

[Led Power Indicator] The led power indicator clearly displays working hours to prevent power worries. [Heavy Metal Tones] Built-in knob for adjusting distortion and volume, delivering heavy metal tones. [Audio Device Connection] Connect mp3 audio devices to amplifier via earphone cable and output to speaker. [Compact Design] Compact and lightweight, fits easily in your pocket for ultimate portability. [Fast Charging] Built-in 500mah battery charges in just 1-2 hours for quick use. Spec: Item Type: Guitar Headphone Amplifier Material: ABS Color: As shown in the picture Battery: Polymer lithium battery 500mAh(Built-in) Current: Maximum 20mah Regulator: 3 modules in total: driver, tones, and volume Charging Time: About 1~2 hours Weight: Approx. 101g / 3.6oz Package List: 1 x Headphone Amplifier 1 x Audio Cable 1 x USB Power Cable 1 x Headphone Adapter How To Use: Please it before use, connect the MP3 audio device and amplifier with the earphone cable, and then plug the amplifier into the loudspeaker to use.