I’ve had these knob inserts and the past and they work just great. I’m so done with having to buy little “tablet” batteries that aren’t rechargeable and are overall inconvenient and ridiculous to be using. The UltraPoi LED Knob Shells offer a variety of settings and light up nice and bright. The tracers are also awesome.
They are amazing, only if you have the Lotus Poi custom from @Sacreddesignscollective
best in the entire market