Come and see our amazing products. The posture correction device alerts the user to incorrect posture through real-time monitoring and automatic vibration. When the user's hunchback is detected bending more than 25 degrees, it will immediately activate the vibration reminder. The tester wore orthotics for 2 hours a day and the posture would improve within 3 weeks. When the smart sensor monitors the Angle, it will automatically trigger a slight vibration, reminding the user to actively adjust to the correct posture, eventually forming good posture habits, protecting eyesight, and relieving back fatigue. This device comes with a 150mAh polymer lithium battery and lasts for 15 days. Pls confirm with us about the packing info, stock color and exact production time before placing your order.