Features: [Industrial Temperature Humidity Meter] Industrial chip & industrial shielded cable & industrial anti-interference & industrial Swiss probe, more professional and precise real-time detecting performance. [HD Display] 1.8" high definition large display screen with backlight, easier and clearer to read values. [Temperature Measurement] The measurement range of -20-80-4-176 the resolution of 0.10.1F, the measurement accuracy of 12F. [Humidity Measurement] The measurement range of 0~100%RH, the resolution of 0.1%RH (0~99) and 1%RH (100), and the measurement accuracy of 4%RH. [Upper & Lower Limit Alarm Setting] Real-time detecting environmental temperature and humidity. When it exceeds the set value, the tester will give a sound and light alarm. At the same time, you can set the alarm duration. [External Alarm Output] Capable of connecting an external alarm by 3.5mm earphone plug. [Back Hidden Contraction Bracket] Equipped with a bracket on the back, more convenient to place. [Various Fixation Methods] Wall hanging, Hanging, hidden bracket support, tripod support, meeting different placement needs of users. [Wide Applications] Suitable for home, office, workshop, outdoors, cinema and other places. Specifications: Material: ABS Color: Black Power Supply: 220 AC input, output 5V 1A adapter Display Mode: 1.8" single character digital tube display Temperature Measurement Range: -20-80-4-176 Temperature Resolution: 0.10.1F) Temperature Measurement Accuracy: 12F Humidity Measurement Range: 0~100%RH Humidity Resolution: 0.1%RH(0~99); 1%RH(100) Humidity Measurement Accuracy: 4%RH Temperature Alarm Setting Range: Hi: -20-80-4-176 ; Low: -19-80-2.2-176 Humidity Alarm Setting Range: Hi: 2~99%RH; Low: 1~98%RH Sampling Rate: About 3 times per second Alarm Duration Setting Range: 6~120 seconds (cycle addition or subtraction) (factory default 6 seconds) Working Temperature: -20-80-4-176 (working time should not be more than 10 minutes at 60~80(140F~176F)) Item Size: Approx. 32.3*16.3*3.8cm / 12.72*6.42*1.5in Item Weight: Approx. 673g / 23.74oz Package Size: Approx. 40*23*7.8cm / 15.75*9.06*3.07in Package Weight: Approx. 1056g / 37.25oz Note: Please read the Users Manual before use. Packing List: 1 * Temperature and Humidity Meter 2 * Removable Back Support 2 * Screw 1 * USB Charging Cable 1 * Users Manual(English)