Bose QuietComfort Earbuds II QCII True Wireless Noise Cancelling In-Ear Headphones - Refurbished Cosmetic Condition:Grade A- - Very Good so stay informed when Versa

so stay informed when Versa 4 detects that your heart rate is above or below your threshold

This back cover will arrive with a heart rate sensor and vibrator

internal wires

Fits Model: B0534

Bose QuietComfort Earbuds II QCII True Wireless Noise Cancelling In-Ear Headphones - Refurbished Cosmetic Condition:Grade A- - Very Good so stay informed when VersaFeatures: CustomTune Sound Calibration: Optimizes noise cancellation and sound performance to fit your ears, ensuring your music sounds its best. Proprietary Noise Cancelling Technology: Powerful microphones detect and cancel environmental noise, so you can focus on what matters. Legendary Sound in a Compact Design: High performance drivers and electronics deliver clear, lifelike sound with depth and nuance in a sleek, stylish package. Multiple Noise