This is an open box item - guaranteed to be brand new with all parts present.Retail price on Amazon was last reported as $105.59.Ships in the original manufacturer's packaging.Ciibo Ivy Stock #: 11760275-AmazonDsp.Services.Objects.Ivy.IvyProducts.IvyProduct+Shelving--------------------------------View on AmazonNirakoka RV Automatic Transfer Switch has been pre-wired to automatically change the primary source of AC current from shore power to generator or inverter power when activated.WIDE APPLICATION — Applied to RVs, speedboats, and various high-power equipment that requires emergency power supply.AUTOMATICALLY SWITCH — This Automatic Transfer Switch 50 AMP can be used to automatically switch between inverter power and a generator. It switches to inverter power when the generator stops running. In the event of a inverter power outage, the generator will start automatically. The green L.E.D is lit when generator power is present.DOUBLE PROTECTION — Double protection of built-in mechanical interlocks and control circuits prevents two separate 120/240 volt AC power sources from entering the AC distribution board at the same time and causing a short circuit.TIME DELAY CIRCUIT — Once AC power from the Generator is sensed by this RV Automatic Transfer Switch, it will start a timer and automatically switch over to generator power supply after a 20-45 sec delay which ensures the generator has sufficient time to run up to speed before electrical load is applied.