NextGen Bluetooth Spider Resistance Band with Handles Headphones they are IPX4 sweat proof they are IPX4 sweat proof In 30 seconds steam releases it’s easy to feel like you aren’t making any progress but by pairing up the stretch cord resistance band with the mobile app you can record your workout history with timestamps to boost the efficiency of your workouts More Features You’ll Love: Let’s you track your heart rate and calories burned in real time Can provide up to 5 hours of use on a single charge making it ideal for traveling Compatible with most IOS and Android smartphones with Bluetooth Made with a built in rechargeable battery and comes with a USB Type C Cable Suitable for both beginners and seasoned pros for low high intensity workouts Build & Tone Your Body The Smart Way With NextGen Bluetooth Spider Resistance Bands