USB HID 3 Button RF Transmitter KeyFob.
Frequency: 418MHz
Distance: 750 feet
Event Mapping#: 2,4,5
Address: 16,777,216 (2^24)
Dimension: 2.23"x1.37"x0.45"

RX KeyFob DataSheet
Button Mapping.

Applications: Controls, Process Equipment, Automated Processes, Medical Equipment, Gaming, Special Needs