About this item 1.4 "(34.5mm) Super AMOLED, 450 x 450 pixels (~321 ppi density), 16M Colors, CPU: Dual-Core 1.15GHz, 361mAh Battery, Android Wear OS, One UI Watch 3, Bluetooth, Wi-Fi The Galaxy Watch4 Classic uses red LEDs and infrared rays to calculate your SpO2 levels or the amount of oxygen in your blood. Glass front (Gorilla Glass DX+), MIL-STD-810G compliant, 50m water-resistant (IP68), Compatible with standard 20mm straps, ECG certified, Blood pressure monitor 5 ATM / IP68 The water and dust resistance rating, Military-grade durability, Larger screen but lighter and thinner for more comfort. Cellular LTE model Compatible with Cellular Network, Contact Carrier to Register on your account. Compatible with Android devices. Supports Samsung Pay. 4G LTE Bands: B2 (1900 MHz), B4 (1700 MHz), B5 (850 MHz), B12 (700 MHz), B13 (700 MHz), B25 (1900 MHz), B26 (850 MHz), B66 (1700 MHz), B71 (600 MHz) - Please check if compatible with your carrier. US Model - compatible with US Carriers. NOT Compatible with Canadian carriers for LTE › See more product details