EBay Home Arduino Module Sensor Chips About Us Features: 1. Multi-function temperature and humidity meter: real-time monitoring of temperature and humidity, creating a comfortable and healthy environment for your family. 2. Multiple scenes at will, can stand or hang, any placement is not restricted, easy to use. 3.12/24 Hours switching, Celsius and Fahrenheit display can be switched, you can view the temperature and humidity of the highest and lowest memory value. 4. Indoor and outdoor temperature and humidity trend arrow indication, real-time control of temperature and humidity changes, warm and cold first, take care of your family. 5. Three channels and indoor temperature and humidity can be displayed at the same time, three levels of indoor environmental comfort display, can be recorded indoor and outdoor temperature maximum / minimum value. 6. Upper and lower limit alarm: when the temperature and humidity exceed the set upper and lower limits, the receiver will issue a corresponding color alarm. 7. Wide range of applications: suitable for bedrooms, kitchens, study rooms, warehouses, sheds and other fields. Parameter: Temperature measurement range: Indoor: 0~50℃ Outdoor: -50~+70℃ Measurement accuracy: ±1℃ Resolution: 0.1℃ Humidity measurement range: 20~99%RH Measurement accuracy: ±5%RH Resolution: 1%RH Power supply: AAA 7 batteries *3 (shipped without batteries) or DC 5V power cord (host) Product Size Host: 12.5*12.5*2.5Cm Sub-machine: 10.5*5*3.7Cm Note: If the temperature is between 15.6~26.7℃ And the humidity is between 50~70%RH, there will be no expression display. When the temperature or humidity alarm condition is triggered, the corresponding warning color of the receiver will be turned on and accompanied by a clattering sound for 5 seconds, and the corresponding alarm icon will keep flashing until the temperature and humidity conditions are no longer valid, and in the case of no operation, the corresponding warning color of the receiver will be turned on and accompanied by a clattering sound for 5 seconds every one minute, and the alarm will be muted by pressing any key. Package include: Temperature and humidity host *1 Temperature and humidity sub-machine *3 Data cable *1 Instruction manual *1 Payment Shipping Refund Payment  Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 30 days of delivery date and item must be in original new condition. Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner. Shipping Please fill in the correct address and zip code and I will ship quickly! Refund If the item is defect when you receive it or you are not satisfied with it, please return it within 30 days for a replacement or money back. But the items must be back in factory condition. Please contact us and double check the return address before you return it.