Wireless data logger RTR-507/507L is a model in the RTR-500 Series, which enables wide-range high-precision measurements of temperature and humidity. The data logger achieves a humidity measurement accuracy of ±2.5 percent, as well as wide-range measurements of temperature from -30-80°C and humidity from 0-99 percent rh. By using the RTR-500 Series base unit, the recorded data in the RTR-507 not only can be collected via wireless communication, but can also be used for data monitoring, warning monitoring, and data management through networks to construct a data-logging system to match the needs and environment of the user. The logging capacity of the RTR-507 is 8,000 data sets consisting of both temperature and humidity. The RTR-507L offers an extended-life battery.