Product Manual Specification: Rated input: 5V 1A. Power supply: Internal power supply. Communication method: bluetooth 4.1 or higher. Working hours: 90 hours. 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: Pink, Blue, Yellow. Size: 120x132mm. Neck circumference: 26-33cm. Weight: 50g. Features: - Deviation 5-20 ° intelligent reminder. - bluetooth connection Wechat Applets. - Personalized customization. - 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. Package included: 1 x Hipee Intelligent Posture Corrector. 1 x USB Cable. 1 x Manual. Instructions: 1.when the device is off, long press the device button for 15 seconds and the device will enter the state of posture recording. Note: After long pressing for 3 seconds, the device will turn on. don't let your hand go，please continue to press and hold the button until the device vibrates again. 2. After entering the posture recording state, quickly bring the device to the neck, and maintain the correct sitting position. After about 4 seconds, the device vibrates again, indicating that the posture recording is successful. 3. After recording successfully, when you over 15 degrees, the device will vibrate to remind you after 3 seconds. Note: 1. Wear the device, and set up the correct posture according to the instructions in App.Set up the suitable angle and time lapse of the reminder. 2.This product is recommended for children over 3 years old, teenagers and adults use. 3. For the first use, it is recommended to fully charge the equipment first. 4. This device needs to be worn close to the body, it may be Cause the data to be inaccurate