Beurer Activity Sensor Fitness Tracker AS81

• Measures activity tracking, steps, distance, calorie consumption, activity duration, the achievement of activity goals, and sleep tracking
• Optimal tracking using the free Beurer Health Coach app; the device easily synchronizes with your smartphone via Bluetooth so you can track your measurements and see how they look over time
• XL OLED display so you can easily read the time along with your activity measurements
• Memory capacity on the device for 30 days and 7 nights
• Additional features; alarm function, vibration alarm, splash-proof 
• Product Dimensions : 9.9 x 0.8 x 0.5 inches; 3.53 Ounces

Download this product's instruction manual here