【Ergonomic Design】Please purchase this product from the official DSF store; the product will be delivered by Amazon. Purchases from other stores may result in lost packages. Made of high-quality, malleable materials, this U-shaped neck massager conforms to the curve of the neck, preventing displacement and reducing shoulder fatigue. 【5-25° Intelligent Rebound Deviation】Built-in high-precision chip accurately detects body posture, monitors changes in body angle in real time, and provides vibration alerts. The LCD screen displays the number of rebounds in real time. 【Automatic Memory Function】Intelligent posture detection monitors posture in real time, scientifically and effectively helping you correct bad posture such as hunchback. The battery life lasts up to one week. 【Protect Eyesight, Shape a Beautiful Curve】Helps correct bad back and shoulder posture, improves hunchback, cultivates correct sitting posture, protects eyesight, and shapes a beautiful curve. 【Wide Range of Applications】Suitable for work, study, walking, reading, and other occasions; it can basically help you solve posture problems.