Sony WH-1000XM4 XM4 Wireless Noise-Cancelling Over-the-Ear Headphones - Refurbished Cosmetic Condition:Grade A- - Very Good Wrist-based heart rate tracking and

Wrist-based heart rate tracking and Pulse Ox technology

The speaker driver size is 40MM

White for Gold Inside Panel (Left / Right)

that are built for rugged adventures

These parts are compatible with a Samsung SM-R810 or SM-R815U smartwatch

Sony WH-1000XM4 XM4 Wireless Noise-Cancelling Over-the-Ear Headphones - Refurbished Cosmetic Condition:Grade A- - Very Good Wrist-based heart rate tracking andFeatures: Active Noise Cancelation. Industry leading noise canceling with Dual Noise Sensor technology Battery Life. Up to 30 hour battery life with quick charging (10 minute charge for 5 hours of playback) Premium Sound. Premium sound quality by DSEE Extreme technology Touch Controls. Touch sensor controls to pause, play, skip tracks, control volume, activate your voice assistant, and answer phone calls Speak To Chat. As soon as you speak to someone,