2 Pack Instapark TU19 24 Hour 15 Amp Heavy-duty Plug in Mechanical Timer with Dual 3 pin Grounded & Polarized Outlets 24-hour programmable mechanical plug-in timer with grounded 3-prong plug timer and overwrite switch, 2 per pack Dual grounded receptacles for both 2-prong and 3-prong appliances Heavy-duty rated at 15 amps maximum, ideal for space heaters, air conditioners and other heavy electrical loads Easy to operate and programmable with 48 pushpins, up to 24 on/off settings per day Conforms to UL standards, certified by CSA and Intertek ETL listed