AMIR 3-channel indoor and outdoor temperature and humidity meter is suitable for a variety of scenarios, can be placed in multiple environments, one product to meet the needs of multiple products. Specification: Measurement Range: Indoor Temperature: 0 to 60 C Accuracy: 1'C Outdoor Temperature: -40 to 60 C Accuracy: 1'C Indoor Humidity: 10%-99% Accuracy: 5%(only between 20%-90%) Outdoor Humidity: 10%-99% Accuracy: 5%(only between 20%-90%) Base Station: 3 x AAA 1.5V Alkaline or Lithium batteries (not included) Remote Sensor: 2 x AAA 1.5V Alkaline or Lithium batteries (not included) Note: Possible Problems? 1. Q:Temperature sensor reads too high in the day time. A:Make sure the thermo-hygrometer is mounted in a shaded area on the north facing wall. 2. Q:Indoor and Outdoor Temperature do not agree. A:Allow up to one hour for the sensors to stabilize due to signal filtering. The indoor and outdoor temperature sensors should agree within 2 C(the sensor accuracy is 1 C). Use the calibration feature to match the indoor and outdoor temperature to a known source. 3. Q:Display console contrast is weak. A:Replace console batteries with a fresh set of batteries. Package: 1 x Indoor Outdoor Thermometer Hygrometer 3 x Thermo-Hygrometer Transmitter 1 x User Manual