1、Portable Guitar Headphone Amplifier with true analog circuit, faithfully simulates the response of amps. 2、Supports GAIN, TONE and VOLUME adjusting, you can create your own guitar sounds freely. 3、With 3.5mm headphone jack, playing guitar with headphone at high volume but not bothering neighbors. 4、3.5mm(1/8 inch) AUX input jack lets you play guitar with the music you like in your audio player. 5、Built-in rechargeable battery, supports up to 5-6 hours continuous working time, and with LEDs showing charging status and remaining power. Features: Portable Guitar Headphone Amplifier with true analog circuit, faithfully simulates the response of amps. Supports GAIN, TONE and VOLUME adjusting, you can create your own guitar sounds freely. With 3.5mm headphone jack, playing guitar with headphone at high volume but not bothering neighbors. 3.5mm(1/8 inch) AUX input jack lets you play guitar with the music you like in your audio player. Built-in rechargeable battery, supports up to 5-6 hours continuous working time, and with LEDs showing charging status and remaining power. Specifications: Brand: VITOOS Model: METAL Battery: 3.7V 450mA Rechargeable Battery Item Size: 8.5 * 8 * 2cm/ 3.3 * 3.1 * 0.8in Item Weight: 48g/ 1.7oz Package Size: 17 * 11.5 * 3.5cm/ 6.7 * 4.5 * 1.4in Package Weight: 125g/ 4.4oz Package List: 1 * Guitar Headphone Amplifier 1 * USB Charging Cable 1 * Audio Cable 1 * Guitar Headphone Amplifier 1 * USB Charging Cable 1 * Audio Cable