Focus on the operating distance, which should be at least 8-10 meters with a wide transmission angle of ±30 degrees. The button lifespan is a critical durability metric; high-quality remotes should withstand 100,000 to 200,000 presses. Material-wise, look for ABS plastic housing for impact resistance and silicone buttons with oil-injection coating to prevent the printed characters from wearing off. Ensure the product meets CE, FCC, and RoHS compliance to satisfy international safety and environmental standards.