Buyers must prioritize HDMI version compatibility (e.g., HDMI 2.0 or 2.1) to ensure support for 4K/8K resolution and high refresh rates. Key technical factors include impedance matching (100 ohms) to minimize signal reflection, gold-plating thickness (typically 1u" to 30u") on contacts for corrosion resistance, and shielding effectiveness to prevent Electromagnetic Interference (EMI). For automated assembly, ensure the connector supports SMT (Surface Mount Technology) or Through-Hole mounting depending on your PCB design.