
Introduction and Overview
Thank you for purchasing a Bad Elf Flex® radio kit. This manual describes the basic operation
of your Bad Elf Flex, in combination with a Bad Elf Flex radio kit, as well as specifications and
warranty information. For the most recent information, visit
The Flex radio kit provides a UHF radio link used for communicating corrections from a Flex
operating as a fixed base station to one or more Flex units operating as rovers. A Flex radio
connects via Bluetooth to Flex and requires no additional cables.
What’s in the Box?
The following items are included in the standard Flex radio kit:
● Harxon Radio HX-DU1603D
● UHF Antenna
● Rugged carrying case
● AC wall charger
● Charging/Serial Cable
● Survey pole mount
Base and Rover Overview
● What is a Base?
● What is a Rover?
● Limitations
Radio Preparation
Harxon HX-DU1603D
The Harxon HX-DU1603D is an UHF external radio that is designed for easy mobile use in
demanding field conditions for wireless data communication between 410 and 470MHz with
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