Practical: The transparent temperature monitoring meter can be mount to windowpane outdoor, you can reading the outdoor temperature in the room. you can know the outdoor temperature clearly and change your cloth according to the showing data, avoiding catching cold. Waterproof: The transparent temperature monitoring meter has good waterproof function, which is not afraid of the weather. No battery requirement: The transparent temperature monitoring meter owns built-in highly sensitive precision bimetals to sense the temperature change. Without battery requirement, the thermometer is economic, eco-friendly and can be installed on the window by sticker. Durable: The thermometer adopts 3mm thickness acrylic as dial and stainless steel as chip shell, which is durable and wear resistant. Detachable: The thermometer is detachable, which is convenient to clean and recalibrate the recalibrating. Scope of application: The temperature monitoring meter is practical in winter, when the indoor and outdoor temperature difference is . It is durable enough to install on your outside transparent window or door side. Usage:Clean the outside of the glass window or door. Remove the sticker free paper in the unit center. Put the thermometer on the glass outside the window or door backhand. If you need to cleaning or recalibrating the thermometer, the main body of the thermometer can be removed from the plastic claw on the glass. Type: transparent temperature monitoring meter Measuring rang: -40 to 50 Celsius Accuracy: +/- 2 Celsius Colour:transparent Material:acrylic Size:Diameter: about 11cm Package Contents: 1 x transparent temperature monitoring meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.