PYRAMID 42337 - RF SECONDARY TRANSMITTER 110VAC - RF SECONDARY TRANSMITTER WALL OR CEILING MOUNT SHAPE RECTANGLE CASE MATERIAL METAL CASE COLOR BLACK CONNECTOR TYPE WIRELESS VOLTAGE 110VAC FREQUENCY 902-928MHZ WIDTH 6-1/2 IN. DEPTH 1-3/4 IN. HEIGHT 5 IN. FEATURES CONTINUOUSLY BROADCAST TIME SIGNAL BETWEEN 902MHZ-928MHZ (128 SIGNALING CHANNELS) TO UNLIMITED NUMBER OF ANALOG OR DIGITAL CLOCKS WITH NO INTERFERENCE AUTOMATICALLY ADJUSTS FOR DAYLIGHT SAVINGS TIME POWER OUTAGES NO FCC SITE LICENSE REQUIRED - EQUAL TO G2855246