JOYO Mini Electric Guitar Amplifier JA-02 has two tone channels (clean/distortion). You can adjust ON /OD to obtain different distortion levels. From mild overload to massive distortion can be achieved with this small knob.Can be powered both Battery and adapterBattery Cabint:9V 6F 22 Battery 1 PCMP3 and earphone connectionOnly need a cable, can be connected with MP3, you can enjoy unlimited music funMain input jackThe 6.35mm standard interface fits your guitar, mini portable volume, allowing you to enjoy music anytime, anywhereMini portable guitar speakerJOYO JA-02 Mini Portable Guitar amp with portable clasp, you can hang it on your waist anytime, anywhere you want to play3 inch high fidelity woofer, with distortion soundThe sound is clear and realistic, Low frequency is full, high frequency ductility is very good, bringing dynamic shock effect, Independent knob to control the guitar volume and tone, more convenient to play.Auxiliary interface to enrich your playingUse 3.5mm connector to input sound signal, such as CD player, MP3 player, etc., it will make your performance more rich, you can enjoy unlimited music funPower Source    DC IN or a 6F22 BATTERY,1 pcsPower Output    3WImpedance Input    Main input:100kO Auxiliary input:10KOPackaging    JOYO mini amplifier JA-02 / 6F22 battery 1pcs / Manual 1pcsWeight    308gSize    165mm*100mm*45mmEffect    clean / distortion