The black ones cost 21,05 now. All other colours go for 19,31. Might just be true the black ones are a bit conductive. I’ll order a tray of the blacks. We’ll see in a couple of weeks.
Just got a couple of these and .mp3 players with on board memory for an automated roller door application - audible warnings. I am thinking it would be hilariously funny if “unpredictable” audio occasionally and randomly just happened on the speaker…