Check the listing for details. Your Fitness Bluetooth Activity Tracker (NEW) Color: Black. Color: Black, Condition: New, Made in United States. Listed at 1.00 USD. The Your Fitness Bluetooth Activity Tracker in black is a sleek and innovative electronic device designed for fitness enthusiasts. With a focus on providing accurate measurements for activities such as running and jogging, this activity tracker offers features like heart rate monitoring, speed tracking, and calorie counting in both decimal and imperial systems. The lightweight plastic design and wrist-worn functionality make it convenient for both men and women to use for up to 5 days on a single charge. Compatible with Android operating systems, this activity tracker from Gems also includes Bluetooth connectivity, alarm, average speed, clock, and average heart rate monitoring for a comprehensive fitness experience.