Between now and September 1st, Roland MC-101 is on sale for $50 off.
What is it you ask? The MC-101 is solid-yet-light and runs for about five hours on four AA batteries, so you can design sounds, create drum patterns, and compose musical phrases just about anywhere. And it’s not just a scratch pad for simple ideas. You can produce fully-fledged professional tracks or create backing tracks and accompaniment for live performance.
Get more info here: https://www.roland.com/global/products/mc-101/