Features: Pedal style, portable 2-in-1 guitar amplifier and BT speaker, 4W(L)+4W(R). Dual channels design (CLEAN OVERDRIVE) and with GAIN control knobs for each channel. Two modes for overdrive channel: CLASSIC overdrive mode HI GAIN mode. Two footswitches for channels and modes conversion, simple and convenient operation. Built-in DELAY effect for guitar, and with MIX, TIME, FEEDBACK control knobs. Supports BT transmission, can play music from your smart devices via the BT 4.0. With 6.35mm headphone jack, you can practice guitar or enjoy music without disturbing other people. Equipped with a built-in rechargeable lithium battery and comes with a power adapter for convenient and long time usage.