It's fast enough for 210, heats from room temperature to 300 C in 3 seconds. Incompatible with real T245A and T210A handles, must use Sugon. I cannot find a 245 Sugon handle. If you need 210 and 245 swapping, buy a real 1S and T245A. If you need just a 210, this is better. Also, you can epoxy an original S3-B (or 2) to the top to add quick cartridge changing and storage. The idle function works good.