“2D” Full DC Twin-Rotary Inverter Compressor and AC step fan motor. 3 working modes. Soft Start (No more Intensity increase at the start of the compressor) 20hz-90hz, Speed variation Hz by Hz. Minimum working air temperature : -5℃. High COP = lower electricity consumption. Smart Defrost: Optimized defrosting program. Super Quiet heat pump, thanks to the Inverter compressor and the AC step fan motor. Electronic PCB, PID régulation with 0.1°C température précision Simple and Intuitive Display