Specification: Brand: Zeblaze Model: VIBE 7 Lite Colors: black, green, gray, orange (optional) Waterproof: 3 ATM (30M) and IP69K Chip: Realtek 8763EW Display screen size: Large 1.47-inch IPS color display screen. Display resolution: 360 * 360 pixels, 326 PPI. Glass: for Corning Gorilla Glass Motion (sensor): 3-axis accelerometer and 3-axis gyroscope sensor. Health (sensor): wrist Heart rate monitor, Pulse Ox blood oxygen saturation monitor. Bluetooth-compatible: BLE 5.2 Battery capacity: 280 mAh lithium polymer battery. Battery life: Power saving mode: up to 25 days Typical usage mode: up to 14 days Heavy usage mode: up to 7 days Continuous voice call: up to 345 minutes Dial APP synchronization: 300+ System default: 4 Custom dial: support Application Program APP Name: FitCloudPro Smartphone compatibility: Android 5.0 or for iOS 10.0 and above. Material Case: Zinc alloy Button: Zinc alloy Buckle: plastic Wrist Strap Material: Durable and comfortable liquid silicone strap. Width: 22mm, compatible with standard 22mm quick release strap. Wrist circumference: 130-235mm Measure Dial size: 49 * 49 * 13mm/1.93 * 1.93 * 0.51in Weight: 66.5g (with wrist strap), 47.5g (without wrist strap) Packaging size: 162 * 95 * 35mm/6.38 * 3.74 * 1.38in Packaging weight: 215g Durability Working temperature: -40 ° C to 55 ° C. Temperatures below -40 ° C may affect battery life and performance.