The Cicret Bracelet is a prototype wristband that uses a pico-projector to project a smartphone interface onto the user's arm, allowing them to interact with their phone without having to hold it. It connects to a phone via Bluetooth or WiFi and has proximity sensors that detect finger movements as touch inputs on the projected interface. The bracelet has advantages like allowing users to send emails, play games, browse the web, and more directly from their arm. However, it may face issues with low battery life and connectivity problems.