NEW/SEALED. Track your fitness goals with the RBX RF-D3001B GO Bluetooth 4.0 Activity Tracker. This small, black plastic activity tracker is perfect for running and jogging, and comes with a set of features that include connecting to an app on your iOS device, setting goals, and tracking your workouts separately. The LED indicator lets you know how you're doing, while the Bluetooth feature allows you to connect to your device wirelessly. This activity tracker runs on batteries and comes with a spare battery, as well as a screwdriver and manual. The RBX GO also provides measurements for calories, steps and distance traveled. Get fit and stay healthy with this versatile and easy-to-use activity tracker from RBX.