Feature: 1. it's a intelligent strapless posture corrector, you could place it onto your upper back. it reminds you to sit or stand straight up with a real-time gentle vibration reminder. 2. automatic memory function, intelligent perception of incorrect posture, real-time monitoring of posture, scientifically and effectively help you correct unhealthy postures such as hunchback. 3. suitable for various occasions such as work, study, walking, reading, etc. it fundamentally helps you solve your posture problems. Specification: - Color: Yellow,Black - Material: Abs Silica Gel - Charging: USB Charging - Charging Voltage: 5v - Rated Power: 0.6w - Working Current: 0.12a - Size: 124.7 119 138mm Package Included: 1 2pcs Smart Back Support Thank You for Visiting Our Store: 1. Please allow slight measurement deviation due to manual measurement. 2. Real color may slightly different from pictures due to computer screen's resolution, brightness, contrast etc. 3. Any questions,please contact us.[Reliable Choice]: Smart back support suitable for various occasions such as work, study, walking, reading, etc. You can also give it as a gift to your friends, family, and couples. [Ergonomic Design]: Smart Back Support Breaks The Traditional Posture Correction Belt Shape, Is Convenient To Put On And Take Off And Has No Wearing Feeling. The Use Of Food-Grade Silicone Does Not Have To Worry About Skin Cuts And Is Very Comfortable To Wear. [Automatic Memory Function]: Smart travel back supports Intelligent Perception Of Incorrect Posture, Health smart back support Real-Time Monitoring Of Posture, Scientifically And Effectively Help You Correct Unhealthy Postures Such As Hunchback. [Vibrating Reminder]: The smart corrector for hunchback has a vibration reminder, precise sensor technology, when front extension bend angle is abnormal, vibration reminder instantly. [Hunchback Posture Corrector]: It's a intelligent strapless posture corrector, you could place it onto your upper back. It reminds you sit or stand straight up with a real-time gentle vibration reminder.