Highlights Net weight: 85g Material: ABS + elastic shoulder strap Charging output interface: standard V8 interface Charging time: 2 hours (about 2 hours) Built-in battery specifications: 500mA / 3.7V Colour box size: 21.3 * 15.5 * 5cm Fit for weight: About 15-90KG. Product Description: Easily get perfect confident posture – start standing, sitting much straighter. Align your shoulders, spine and upper back. Improve posture & reduce slouching immediately with easily adjustable dual strap design. Lightweight high elasticity nylon corrector can be worn comfortably under or over clothing. Eliminates neck and back discomfort from sitting with rounded shoulders in front of the computer. Wear all day to retrain your posture- it’s nearly invisible when wear under a shirt. -When the hunchback bends more than 25 degrees, the orthosis immediately vibrates to remind What’s in the box: 1 x Smart Back Posture Corrector Weight: 0.3 SKU: 200824161748