(2) Apple Watch 45mm
Stay connected without phone using cellular carrier. Measure blood oxygen levels. ECG app offers an ECG similar to electrocardiogram. Sleep app helps tracks sleep patterns. Track workout metrics. Control audio. Activity Rings. Always-on Retina display. Messages Apple Pay Siri and Maps. Silver stainless steel case. Silver Milanese loop. Sapphire crystal display. SIP with 64-bit dual-core processor. Digital crown with haptic feedback. Water resistant to 50 M. Case: 44mm x 38mm. Band fits wrists 130-180mm circumference.