Citisend provides a locking mechanism that can be installed in most of containers on the market: side loading, bilateral, vertical, rear, inlet, underground, pneumatic and closed areas. The opening is activated by Bluetooth through a citizen application. It can also be supplemented with the use of NFC cards. Access to containers is adaptable to the needs of each municipality: zones, time slots, types of user or number of contributions. This system guarantees battery performance of up to 4 years.