All are electronics, the 33-watt charger works and runs. All watches work. I bought one for 60 but its charger was lost and it needs bracelets. I bought the other two together for 40 and they work with one charger. And this is a working massager. And the scale is broken or I think it just needs batteries, and the handle works but has problems. My limit for it is 60 unless it's offered higher.