Specification:Rated input:5V 1APower supply:InternalPower supplyWorking hours:90 hoursCharging time:1.5 hoursTemperature:-10-55Relative humidity:80%R.HColor:Black,Pink, BlueWeight50gFeatures:Deviation 20 intelligent reminder.posture correction course.Helps to correct the wrong body posture of back and shoulders.Soft food grade silicone.Innovative design, light and thin wear.USB charging.Package included:1 x Intelligent Posture Corrector1 x USB Cable1 x Manual