End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
http://dlweb.farafile.ir/file/39480/جزوه-ترانسفورماتورهای-قدرت-و-نحوه-تست-آنها