Feature:1. Easy Installation: Simply wipe the window or door glass, remove the protective film from the double sided adhesive on the product, place the product on the outside of the window or in front of the glass door. By closing the window or door, you can read the outdoor temperature indoors.2. Sensitive Thermometer: Pointer type temperature gauge with high sensitivity internal precise dual metal components, accurately detecting environmental temperature changes.3. Wide Measurement Range: Temperature measurement range of 40 to 50, wide support range, suitable for temperature changes in different regions.4. No Battery Needed: The transparent thermometer is built with high sensitivity precise dual metal sheets for temperature detection. No battery needed, economical, environmentally friendly, and easily installed on windows with adhesive.5. Calibration Guidance: Do not place the window thermometer in direct sunlight, as sunlight will convert to internal energy, raising the temperature. You can recalibrate to smaller value differences by rotating the dial. In case of significant anomalies, there's a calibration screw on the reverse side for recalibration.Specification:Item Type: Outdoor ThermometerProduct Material: Acrylic Plate, Stainless Steel, AluminumTemperature Measurement Range: 40 to 50, Accuracy 2Product Diameter: Approx. 11cm / 4.3inGross Weight: 80g/2.8oz.Package List:1 x Thermometer1 x Instruction ManualNote:All data are measured manually, and there are certain errors in the measurement results.