US-based startup Rufus Labs has created 'Rufus Cuff', a $300 Android Kit Kat-based wearable tablet which also tracks the user's fitness. The waterproof tablet has a 3-2-inch touchscreen display, 16 GB storage space, multiple language support and LED alerts for incoming texts and calls. Designed to wear on the wrist, it also comes with a front-facing camera for video calling.