Features: Electric guitar headphone amplifier with true analog circuit, faithfully simulates the response of amps. 3.5mm(1/8 inch) PHONE jack allows you to play guitar with headphone at high volume but not bothering neighbors. 3.5mm(1/8 inch) AUX input jack lets you enjoy the music you like in your audio player while playing guitar. Features heavy rock distortion effect, with distortion degree(DRIVE) and tone control knobs. Built-in rechargeable battery, supports up to 3-6 hours continuous working time, and with LEDs showing charging status and remaining power. Specifications: Color: Grey/ Black(optional) Battery: 3.7V 500mA Rechargeable Battery Item Size: 8.5 * 8 * 2cm/ 3.3 * 3.1 * 0.8in Item Weight: 48g/ 1.7oz Package Size: 18 * 13 * 3cm/ 7.1 * 5.1 * 1.2in Package Weight: 115g/ 4.1oz Package List: 1 * Guitar Amplifier 1 * USB Charging Cable 1 * Splitter Headphone Audio Adapter 1 * Audio Cable