TRSI TA623A Industrial Wall-mounted Thermometer Hygrometer, Built-in ProbeFeatures: 1. High precision temperature and humidity sensor: Swiss SHT C3 high precision sensor is used, with a sampling rate of up to 2 times second. 2. Hidden retractable bracket on the back: There is an independent bracket on the back, which can be placed on the desktop. 3. Upper lower limit over limit prompt: The upper and lower limit alarm thresholds can be set for temperature and humidity respectively. When the measurement is higher or lower