Amvent Ductless Mini Split Air Conditioning Systems are a powerful & flexible way to efficiently cool a room. Each system has two parts: an indoor unit & an outdoor unit. The indoor unit is mounted using a bracket - like a picture frame - on an exterior facing wall, then connected to the outdoor unit using a small hole drilled through the wall. Electricity is supplied via a 20 Amp Breaker (not supplied) to the Outdoor unit. The indoor unit draws its power from the outdoor unit.