Model: HR202 - Color: Blue - Material: PCB - Model 1: - Detects the ambient humidity - Applied to the storage compartment indoor air quality control building automation medical industrial control systems wide range of applications and research fields - Adjustable sensitivity - Operating voltage: 3.3V~5V - Output: a analog voltage output / b digital switch outputs (0 and 1) - With fixed bolt hole for easy installation - With stable LM393 chipset in comparator - Model 2: - VCC 3.3V~5V external power supply - GND external GND - DO digital output interface (0 and 1) - AO analog output interface - Packing list: - 1 x HR202 humidity detection sensor module - 2 x Dupont cables (20cm)