The Danfoss Thermostat RMT230 087N110001 is a programmable thermostat that is compatible with Danfoss brand systems. It features a square-shaped design and is wall-mounted for easy installation. The thermostat operates on a corded electric power source and has a 3-wire wire configuration. With a single programmable period per day and a heat stage of 1, this thermostat is ideal for controlling heating systems efficiently. It also includes features like adjustable thermostat settings and frost protection, making it a reliable choice for maintaining optimal indoor temperatures. This unit is in a bag and not a box in is not 2nd Hand used it is old stock that has been left in storage so needs to be used .