Overview: Deviation 5-20 intelligent reminder. Bluetooth connection APP. Professional posture correction course. Helps to correct the wrong body posture of back and shoulders. Human-computer interactive games. Soft food grade silicone. Innovative design, light and thin wear. USB Type-C charging. Specifications: Rated input: 5V 1A Power supply: Internal power supply Communication method: Bluetooth 4.1 or higher Charging time: 1.5 hours Temperature: -10-55? Relative humidity: ?80%R.H Software version: Support IOS6.5.8, Android 6.5.7, or above Color: Adult: Red; Child: Pink,, Blue Specification: English version , Chinese Version? Only the black adult version can use the English version of the APP) Package Content: 1 x Intelligent Posture Corrector 1 x USB Cable