The Fly 3 bass is a compact, innovative mini amp that that gives you huge tone on the go. Combining two selectable channels, A continuously variable mid-cut EQ, sub bass and a compressor for ultimate control over your dynamics; it's the perfect take-anywhere amp for your bass guitar, phone or tablet. The fly 3 bass also comes with an MP3/ line in jack Built-in, allowing you to connect to your MP3 player, mobile phone, laptop, tablet etc. And jam along to your favorite tracks; the speaker emulated output jack can also be used with headphones or for recording. You can combine the fly 3 bass with the fly 103 to create a 6 watt stereo Bass guitar amp set-up. The pair of them linked together create one An amazing portable speaker system, for your PC or computer speakers to play your music through.