Hello How can I put a product free of charge??
You can’t. Envato decides the price of the item and it will always be greater than zero.
You can submit your item for the free file of the month, but it has to respect some conditions (good rating for example).
Yes, how can I send this item
Submit it here: Free File of the Month Nominations March '16 or you might have to wait for the April thread.
Thank You bro