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℃, the resolution of 0.1℃, the measurement accuracy of ±1.0℃. [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℃ Temperature Resolution: 0.1℃ Temperature Measurement Accuracy: ±1.0℃ 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: -19℃ ~ 60℃; Low: -20℃ ~ 59℃ 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℃ ~ 60℃ (working time should not be more than 10 minutes at 60℃ ~ 80℃) Item Size: Approx. 32.3*16.3*3.8cm / 12.72*6.42*1.5in Note: Please read the Users Manual before use. Package includes: Instruction+certificate+power connector+hanging hook+screw+power data cable * 1