The product provides a variety of effects for the electric guitar and bass, including the amplifier modeling and speaker cabinet IR's (impulse response). It also comes with an acoustic guitar simulator for electric guitar. Features: 13 Amp Models, 20 Impulse Response files; including guitar and bass cabinets and acoustic guitar simulation, 19 varieties of effects. True simulation of analog circuit by NUX EFX. It allows you to play in complete silence and yet feel surrounded by a high-quality musical sound. Headphone/ earphone quality determines different sound quality. Physical amp modeling algorithm. Dual mode BT 4.2; BT audio EQ scenes. Built-in long-lasting 1000mAh rechargeable battery, easy to charge via the USB cable. You can customize the presets and create your tone, play along with music, and you can easily connect to your computer to record your Guitar/ Bass tracks. Recording software required. Note: Size and color may be slightly different because of manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black Material: PVC Current: 190mA Input Impendence: 1M Rated Power: 125mW x 2 Frequency Response: 20Hz-20kHz Built-in Battery: 3.7V 1000mAh Lithium Battery Item Size: 81 * 41 * 30mm / 3.19 * 1.61 * 1.18in Item Weight: 64g / 2.26oz Package Size: 12.5 * 8.5 * 6cm / 4.92 * 3.35 * 2.36in Package Weight: 157g / 5.53oz Package List: 1 * Amplifier 1 * USB Cable 1 * User Manual (English)