Two-way Power-G Visonic wireless control panel, supervised radio signaling (no missed radio signal), increased transmission distance, AES-128 high-security coding process, FHSS multi-frequency technology, TDMA communication synchronization, includes: wireless control panel unit with built-in operator and siren, hub has 28 wireless zones (zones receive Visonic PG2 sensors), remote transmitter and wireless operator, built-in telephone communicator, wireless siren connection option