Operating in 868 MHz ISM band and over -20 to +125°C range, MSR385WD records temperature, humidity, and pressure values transmitted by MSR385SM modules. Latter can communicate over distances of up to 500 m and allow for adjustment of measuring and transmission intervals: 1 sec, 10 sec, 1 min, 15 min, or 1 hr. Multi-channel data logger, featuring integrated ISM band receiver module, receives and stores measured data of up to 10 MSR385SM transmitter modules.