... :250K,receiver sensitivity: less than -100.3,Launch power:less than 20dBm(100mw)4, ... at the same time.5,Ten numeric keys,One Call key and two LEDs:power indicator (red) and working indicator (green).6,Can ... set of multi-way intercom system,can be uesd in offices,workshops,homes,buildings ect.Using the 2 ... ,CALLA:First press the ID number, then the CALL button, enter the main CALL with the red lightB:No ...