The Function Switch ARK-LES p/n 11-21-2099C-003 is a replacement part designed for older room air conditioning units. Specifically designed for through-the-wall/window air conditioners, this switch allows for 2 cool speeds and operates at a voltage of 120/240 VAC. Made of durable plastic, this unit has a current rating of 15A and is compatible with the ARK-LES brand. Perfect for maintaining or upgrading your heating and cooling appliances, this function switch ensures efficient and reliable control of your air conditioner. This type of switch was used with older type of air conditioners by many manufacturers.