LCD digital thermometer and hygrometer for cameras, temperature and humidity monitor for greenhouses and gardens

Temperature measurement range: -20°C to 60°C (-4°C to 140°C), accuracy: ±1.2°C. Humidity measurement range: 20% RH to 99% RH, error: ±3%. Houdian thermometers and hygrometers update every eight seconds. Press the power button for 2 seconds to turn on the device, double-click to display temperatures in °C or °H. The back panel, power button, and °C/°H conversion button are concealed inside. Thanks to their magnet, these thermometers and hygrometers can be attached to refrigerators and other magnetic objects. The hanging hole allows for easy attachment to a hook. Once attached, they can be placed freely on any flat surface. Note: When using for the first time, it is necessary to allow the thermometer to acclimate to the environment for 10 to 20 minutes.