Positive Grid - Spark GO Practice Amp 

Spark GO features boundary-pushing computational audio that creates surprisingly big, full detailed tone for an amp its size.
Stocked with 33 amps and 43 effects, create your own custom preset or download 50,000+ tones from the ToneCloud community.
Search for your favorite songs and the Auto Chords feature will analyze and display chords for you - all in real-time.
Create your own virtual band with Smart Jam - an AI powered bandmate that listens and learns your playing style and jams along with you.
Jam, play and listen to music all day with a USB-C rechargeable battery that lasts up to 8 hours.