Livescribe’s Sky Wi-Fi Smartpen allows the user to save real-time audio and visual notes in their mobile devices. It can capture whatever you draw or write on paper in its internal memory or sends to mobile devices using wifi connection. Available in 2GB, 4GB, and 8GB storage with additional 500MB online storage, this smartpen features setup buttons and a built-in OLED screen that shows time, Wi-Fi connection status and battery life. All you need is a Livescribe specific notepad that costs $12 to $25.
Available at amazon.com for st-$170