The Bestand Back Posture Trainer & Corrector Pro Device with Necklace Core is a white activity tracker designed for unisex adults. It features memory storage and a rechargeable battery, making it convenient for tracking sitting activities. Made of plastic, this device operates on both iOS and Android systems, and provides posture correction and training in English language. With its innovative design and advanced technology, this product helps users improve their sitting posture and overall spinal health during daily activities.