Apple Watch Sport 42mm Space Gray Aluminum Case with Black Band (Refurbished) Renewed products look and work like new. These pre-owned products have been inspected and tested by Amazon-qualified suppliers, which typically perform a full diagnostic test, replacement of any defective parts, and a thorough cleaning process. Wireless devices have batteries tested to have at least 80% capacity relative to new at the time of sale. Packaging, wall plug and charging cable may be generic (headphones not included). Wireless products on Amazon Renewed come with the 90 day Amazon Renewed Guarantee. System on a chip: Apple S1 Sport Band with stainless steel pin; Digital Crown Heart rate sensor, accelerometer and gyroscope; Ambient light sensor. Fits 140-210mm wrists. Retina display with Force Touch; Composite back, Splash and Water resistant in rain, exercising, etc (but not to be submerged in water, as it's not waterproof!)