Apple Watch Series 10 46mm Smartwatch with Jet Black Aluminum Case GPS Lock Back And with smart person detection these products may differ And with smart person detection length: 26" Large: pit to pit: 20" with apps and features designed to keep you active 4 grams Fits 140‑245mm wrists Controls Digital Crown with haptic feedback Side button Double tap gesture Siri with on‑device processing Chip S10 SiP with 64‑bit dual core processor 4‑core Neural Engine 64GB capacity Sensors Electrical heart sensor Third‑generation optical heart sensor Temperature sensor Compass Always‑on altimeter High‑g accelerometer High dynamic range gyroscope Ambient light sensor Depth gauge Water temperature sensor Health and Wellness ECG app Cycle Tracking app with retrospective ovulation estimates Heart Rate app High and low heart rate notifications Irregular rhythm notifications Medications app Mindfulness app with state of mind tracking Noise app Sleep app including sleep stages Sleep apnea notifications Display Always‑On Retina LTPO3 display Wide‑angle OLED Up to 40% brighter when viewed at an angle Edge‑to‑edge display Ion‑X front glass Up to 2000 nits maximun brightness 1 nit minimum brightness 326 pixels per inch Audio Speaker Media playback Power and Battery Life All‑day battery life