500 W sustained, 750 W peak. By default it’s class 2 and limited to 20 mph (which is what the label on the stem says). I typically ride between around 18 and 22 mph. Only really go above that on flat or slightly downhill sections, where the motor isn’t really as needed anyhow. I ride on assist level 1 (minimum), although sometimes I’ll switch to 0 (no motor assistance) on a downhill to give myself a little more exercise.