Product Description Instantly transform your go-to timepieces into state-of-the-art smart watches with a sleek tech disc that discreetly mounts to the back of any case using a innovative magnet-free suction technique. This rain-, sweat- and splash-proof 3mm thin addition enhances your life with its customizable light/vibration alerts, fitness-tracking accelerometer, music and phone controls and phone locater that activates with a simple tap on your watch. 33mm diameter; 3mm thickness Charging lasts up to 3 days Wireless conductive cradle charger works on disc while attached or unattached to watch case Stainless steel/polycarbonate Imported