Here is the Smartband fitness tracker that you can use while working out! It's absolutely waterproof and it helps you monitor your health! It also has functions of a mobile phone.

Supporting App Name: Search And Download "fundo wear" From The Apple Store Or Android App Store. 

With its 80mAh battery in place, it will get you through numerous days of regular usage time without needing to be recharged. 

Benefits:

• Sleep monitor and Alarm: Automatically track your sleep quality, and alarm silent vibration will wake you up. Monitor your sleep pattern with Deep, shallow and rapid eye movement (REM) phase!
• Don't Miss any Message and Call: It will silently vibrate to inform you of new message, SNS from facebook, twitter, WhatsApp, WeChat, and incoming calls.
• Multi-functional Fitness Tracker: Accurately track your steps, distance, calories burnt, and heart rate all day.
• Wider Compatibility:  For iOS 8.1 And Above, And Android 4.4 And Above, Support Bluetooth 4.0 Smart Phone.
• Heart Rate Monitor: 24 hours real-time monitoring your heart rate status and help user makes a proper exercise plan. The heart rate data are only for your reference to adjust your exercise, NOT for medical use.

Additional Features:  Blood oxygen monitor, Pedometer, Distance analysis, Calories analysis, Sleep monitor, Hand raise the light up, Sedentary reminder, Find my device, Remote camera, Messages Sync, Calls reminder, Movement tracker (steps, distance, calories), Alarm clock, Weather forecast reminder

• Built-in 80mAh battery, 25 days long standby time, 7 days working time.
• 0.96 inch 96 x 64 high resolutions LCD round touch big screen display.
• Bluetooth 4.0, RAM / ROM: 32KB + 256KB