Feature: 1. DURABLE MATERIAL: Made of high quality ABS material, compact, lightweight, shock resistant and durable. 2. NO BATTERY NEEDED: This product can indicate the temperature and humidity of the measured environment, without power supply, maintenance, and calculation, which is energy saving and environmental friendly. 3. CLEAR TO READ: The classic dial style is simple and generous, and the clear scale makes reading easy, so you can use it with confidence. 4. EASY TO INSTALL: With a foldable bracket, you can put it on the tester or hanging it on the wall, to meet your variouis need. 5. WIDELY USE: Widely used in the temperature and humidity measurement of scientific research, production workshops, computer rooms, libraries, archives, warehouses, and room environments. Specification: Item Type: Temperature Humidity Tester Model: G101 Material: ABS Application: Temperature and humidity measurement Temperature Measurement Range: -20℃~50℃ Humidity Measurement Range: 10%~100%RH Temperature Error: ±1℃ (10-32℃), ≤±2℃ Humidity Error: ≤±5%RH (50%~99%RH), ≤7%RH (25%~40%RH), ≤±9%RH.wang-edit-text tester { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text tester td, .wang-edit-text tester th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text tester th { text-align: center; }. Package List: 1 x Temperature Humidity Tester Note: Do not use in high temperature venuesPlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.