When sourcing smart curtains, you must prioritize motor torque (measured in Nm) to ensure it can handle the weight of the fabric; typically, 1.2Nm to 2.0Nm is standard for residential use. Additionally, verify the noise level, which should ideally be below 35dB for premium applications. Check for multi-protocol compatibility, ensuring the motors support Zigbee 3.0, Matter, or Wi-Fi (2.4GHz) to integrate seamlessly with existing smart home ecosystems like Apple HomeKit, Google Assistant, or Amazon Alexa.