novax 2018 Mailbox Master Controller is an advanced, multi-purpose device which works with novaX Mailbox Monitoring System. This panel utilizes IP-based communication for high-speed data transmission. With one IP address, it can support up to 508 mailbox sets. Users can receive real-time notifications via SMS / POP Message / Email regarding letter arrivals, mailbox door status, and the electronic lock status of their respective mailboxes.