RoboDot RTK GPS can be purchased with a 900mhz radio enabled for Rover or Base applications.  The radio can also be activated at a later date.  Antenna type, internal or external must be selected at the time of purchase.
 
Features:
Dual-Band GPS Base Station with NTRIP Caster over WiFi
GPS Rover Mode with NTRIP client
Internet access via internet access points over WiFi
Supports RTK and PPK Workflows
Multi-constellation GNSS. GPS, GLONASS, Galileo, BeiDou
16GB memory for observation logging
1/4-20 Threaded tripod mount
Thread ready USB-C receptacle 
Serial Output, NMEA, RTCM3
CANbus 
 
Kit Includes:
RoboDot
6ft USB C cable
1A USB Wall Cube
USB C seal
Ground control point (GCP) painting stencil
12-month manufacturer warranty 
RoboDot Windows Utility for PPK workflows
Optional 900mhz Radio
Optional External Antenna