Feature: 1. DC5V Power Cable: Can perfectly solve the problem of inaccurate test caused by insufficient battery power at the later stage of battery power supply. 2. Accurate: During use, there is a more standard temperature and humidity data, so that the monitor can be set and calibrated accordingly. 3. Intelligent: When the temperature and humidity exceed the upper and lower limits, the receiver will emit a corresponding color alarm. 4. Simple and Practical to Use: Real time temperature and humidity monitoring, creating a comfortable and healthy environment for the family. 5. Multiple Modes: When the thermometer is powered by the power cord, in standard mode, you can long press the button to select always on or off the backlight. Turn on the energy saving mode, the backlight does not light, turn off after seconds in any setting. Specification: Item Type: Indoor Thermometer Material: ABS Weight: Approx. 240g/ 8.5oz Size: Approx. 12.6x12.6x2.4cm/ 5.0x5.0x0.9in Two Power Supply Modes: Dry battery, AAAx3 (delivered without battery), USB power cable . Package List: 1 x Indoor Thermometer1 x USB Cable1 x Specification