Description: Move It Beat Smart Dumbbells Hand Weights Set of 2 - Calorie Calculation Action Recognition Connect with APP Fitness Dumbbell for Home Gym Equipment Workouts Strength Training Free Weights for Women Men.   Features: Made of quality silicon, skin-friendly and comfortable;  Unique shape design, ergonomic and anti-slip;  Used with Move It APP to realize your exercise details and get training courses;  All-in-one dumbbell allows you to have a versatile workout;  Can be used to sculpt your arms or tone your back;   Specification: Item name: Move It Beat;  Battery: 180mAh;  Voltage: DC 5V;  Rated power: 66mW;  Output: 5V 0.5A;  Charging time: 2hrs;  Product size/weight: Type 1: 58*198mm/0.75kg;  Type 2: 58*210mm/1kg;  Package size/weight: Type 1: 150*250*100mm/1.7kg;  Type2: 150*250*100mm/2.2kg;   Note: There is a little of difference according to manual measurement.  Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.   Package List: 1 Pair of Dumbbells