When selecting lady digital watches, prioritize movement stability and display clarity. Ensure the watch uses a high-quality quartz oscillator for time accuracy (typically ±30 seconds per month). For the display, FSTN or LCD screens with wide viewing angles are preferred. Additionally, check the battery life, which should ideally range from 18 to 36 months depending on the functions used. For the casing, 304 stainless steel or high-grade ABS plastic provides the best balance between durability and aesthetic appeal.