PRU-50 is a USB powered programmer which can be used to program Jotron’s:

• EPIRBs
• Handheld VHF (Tron TR20)
• ML-series of lights

Technically, this unit converts signals from virtual COM ports on a computer (through a USB-serial adapter built into PRU-50) into infrared light which is used to communicate with EPIRBs or programmable lights.  This means that software only supporting legacy Serial ports on computers also will function with this programmer.