These Smart Pasties let you instantly share anything with a tap. Download an NFC app (like NFC Tools), simply tap to open links directly to Instagram, TikTok, or other social profiles, Venmo, Cash App, or tip links, websites, and more. * Waterproof and sweat resistant for reliable wear * Works best when scanned with the top of the phone * Metal can interfere with NFC signals (nipple piercings or metal jewelry may affect performance)