The RBX Live Life Active Go Activity Tracker in black is a Bluetooth 4.0 device designed for tracking fitness activities such as gym training and running. Made by the brand RBX, this unisex activity tracker is powered by batteries and can be connected to smartphones using iOS or Android operating systems. The sleek black design and torso body area make it a stylish and practical choice for those looking to keep track of their workouts. Its features include Bluetooth connectivity, making it easy to sync data and track progress in real-time.