Extech’s RH200W Multi-Channel Wireless Hygro-Thermometer displays indoor temperature and humidity levels. You can connect up to eight wireless transmitters to remotely measure temperature and humidity levels up to 30 m (98 ft) away. The LCD displays icons that indicate indoor comfort levels as well as trending arrows that show the increase, decrease, or constant readings. It also records min/max measurements for the duration of each measurement session. Ideal for multi-room environmental monitoring for restaurants, manufacturing facilities, offices, homes, greenhouses, and storage/archive buildings.