This Delvfire Sirius Fitness Tracker is the perfect tool to keep track of your health and fitness goals. It features a heart rate monitor, blood oxygen sensor, and stress and calorie monitoring capabilities. With a battery life of up to 7 days, this tracker is designed to keep up with your active lifestyle, whether you're hitting the gym, going for a swim, or doing yoga.

This waterproof tracker also includes features like Bluetooth connectivity, a music player, and a caller ID function. It is compatible with both iOS and Android operating systems, and comes in a sleek black aluminium case with a black silicone band. With the Delvfire Sirius Fitness Tracker, you can personalise your fitness routine and stay on top of your goals.