- Display and build: 1.39 inch HD touch screen with a metal housing and special composite materials. Very moisture resistant. Built to military quality standards with shockproof, dustproof and corrosion protection for outdoor use. - Comfort and fit: skin-friendly silicone strap, sweat-wicking and keeps you dry and comfortable. Lightweight design for daily wear and active use. - Phone function: smart watch with a built-in Hi-Fi speaker and microphone. Make and answer calls without inserting a SIM card. When connected to your mobile phone, it synchronizes phone books and call logs. - Battery life: 410 mAh battery. Working time 5-7 days and standby time up to 15 days. - Health and wellness: monitors heart rate throughout the day and during exercise; tracks sleep quality at night. Also measures blood pressure, steps, and calories. Includes weather forecast, alarm, and sedentary reminder for comprehensive health management from your wrist. - Sports modes and GPS: 100+ sports modes including walking, running, cycling, basketball, football, tennis, climbing, rugby, golf, yoga, etc. GPS activity tracking automatically records steps, distance and calories burned for outdoor training. - Use scenarios: ideal for outdoor training or hiking with GPS and weather updates; everyday health monitoring and sleep analysis; hands-free calls during commuting or travel without needing to use your phone.