Product specificationsMaterial: PU leather + silver paste + EVA foam cotton boardCharging mode: USB chargingBattery capacity: polymer battery 240mAHPulse width: 50 ± 10 μ sFrequency: 1 ~ 100HzWorking time: 15 minutesProduct size: 325x295x55mmBox size: 345x165x30mmNet weight: 168gProduct weight: 250g