Ships the fastest out of any of our products! USB dongle plugs in to a specific port in Wall Mount Type mini split air conditioning systems. Compatible with select wall mounts - Cooper&Hunter Sophia, Mia, Olivia and Astoria Series Mini Split Air Conditioner.Access, monitor, control, program your Cooper & Hunter system from anywhere in the world using a smartphone Free downloadable application for iPhone or Android phonesProduct Details:Product Dimensions: 2.5 x 1 x 0.2 inches Item Weight: 1.6 ounces Shipping Weight: 1.6 ounces Item model number: OSK10