According to APC, the SurgeStation offers the Lowest IEEE 587 Category A Let-through and UL 1449 330V. IEEE tests simulate severe surge events common to the home and office environment. SurgeArrest provides the lowest let-through voltages for maximum protection. Moreover, SurgeArrest's 330V rating is UL's best available rating against devastating surges and spikes. All SurgeArrest products have received UL's 330V rating.
RETRO-M is designed to replace existing Home Intercom Systems and operate on existing 3 and 4 wire systems. BLUETOOTH you music by adding the BT-RECEIVER. No need to remove existing master wall housing, trim plates available to cover those large holes. The RETRO-M intercom unit has a built-in AM/FM radio. Plug in mp3 players such as iPod, iPhone, Zune or any other hand held player into the master and share your music with the entire family. Choose between two music sources; listen to the radio in one room and the mp3 in another room.