- Save, share and organize notes and sketches using real ink and real real paper. Write and draw naturally and express your ideas in a way that's meaningful to you using Equil Note and Equil Sketch Apps. Equil Smartpen 2 is ultraportable. Write notes on the go and transfer them to your computer, tablet or smartphone when you're ready. The pen and receiver have built-in memory to store notes when not connected to a device, so you never lose important data. They're also rechargeable so you can write continuously for up to 8 hours between charges. br Purchase on Amazon for $169.