Please recommend a timer for an electric engine block heater

After installing the Toyota engine block heater, I bought a Defiant Indoor Heavy Duty timer. When I got home, and opened the timer, I saw the directions say, "Warning, risk of electric fire. Do not use to control appliances that contain heating elements such as cooking appliances, heaters, and irons." My car is parked in a garage so I choose the indoor timer. Thank you.