Zoom G1 Four Guitar Multi-Effects Processor. Stomp effects. Amp models. Lopper & More. 13 built in amp models. 65 built in stomp box effects. 50 patch capacity. Chain up to 5 effects. Built in chromatic tuner. 68 built in rhythm patterns. Built in 30 sec looper. Headphone output option. Aux input for audio player. Download additional effects.