Zehnder ComfoSpot 50 Single Room Heat Recovery Unit with Plastic External Wall Panel, Humidity and CO2 Sensor VPP10746 The ventilation speed and operating The ventilation speed and operating mode settings can be seen immediately at any time with the dimmable LEDs The quick 1A USB C charging capability and the included 1m high quality USB C cable make recharging fast and convenient The ComfoSpot 50's low profile design makes it discreet and its paintable internal and external panels allow it to be blended seamlessly with its surroundings The product also includes both a humidity sensor and a CO2 sesnor which automatically adjust the levels of ventilation according to moisture levels and level of occupancy