Wall Mount Transmitter, Type Round, Switch Action Push Button, Material Plastic, Finish Black, Depth 2 in, Height 5 in, Width 5 in, Color Black, Operating Temp. -4 Degrees to 140 Degrees F, Event Audit Trail No, Keypad No, Cylinder No, Standards ANSI/BHMA A156.10, A156.19, For Use With Mfr. Model No. 59R4-H, 59R4-HSS, Wireless Activation Doors, Features Selectable Frequencies: HDRC, 300 MHz, 390 MHz