It also powers the system if you choose to operate without a battery

woven cable with fast-charging capabilities for selected Apple Watch models

where magnets cause it to snap into place automatically

Faster wireless charging with magnetic alignment

The most rugged and capable Apple Watch

41mm Mulberry Sport Band - M/L iphone12accs It also powers the systemMade from a custom high performance fluoroelastomer, the Sport Band is durable and strong, yet surprisingly soft. The smooth, dense material drapes elegantly across your wrist and feels comfortable next to your skin. An innovative pin and tuck closure ensures a clean fit.