A set of high-quality icons surely will help communicate your content (visually help deliver a message to the intended audience).
✔ Line icon / outline icon
✔ Flat icon
✔ IOS coloured icon
✔ Tile icon (Windows 'Metro Style')
✔ Pixel art / 8-bits
The NDA upgrade fee is $34. You will be prompted to pay the fee right after you click the "SEND" button.Note that by paying for the NDA upgrade, you will be able to send an NDA request to every Freelancer you invite to this project at no extra cost.