USPS 117mAh Battery For Garmin Approach X40 & For VivoSmart HR /HR+ 361-00088-01 | eBay
Compatible with Garmin Vivosmart HR+ Bands Women Men Replacement Silicone Band Straps Bracelet Wristbands for Vivosmart HR Plus Approach X10 Approach X40 Black - Newegg.com