When selecting IoT devices, you must prioritize Connectivity Protocols (such as Wi-Fi, Bluetooth 5.0, Zigbee, or LoRaWAN) to ensure compatibility with your existing infrastructure. Evaluate the Processor Performance and Memory Capacity to handle data processing tasks. For battery-operated devices, Power Consumption profiles and Sleep Mode efficiency are critical to ensure a long operational lifespan. Additionally, verify the Sensor Accuracy and Data Sampling Rates to meet your specific application requirements.