If you enjoy not knowing which way is up, you'll love this. It's a super-tweakable sonic whirlpool machine that'll take you straight back into 60s psychedelia; drugs not included.

Model: Boss RT-20 Rotary Ensemble
Made: Taiwan, recent model
Type: rotary speaker
Power: standard 9v supply or batteries, 85mA draw approx
Switching: buffered bypass
Equivalent new street price (approx): $299aud
Mods: velcro added
Accessories: no box or manual
Condition notes: used, no major marks, very good condition