The Trimble R10 Base receiver sits on a tripod and broacasts UHF GPS corrections.
Features
" Includes Trimble R10 Base receiver with internal UHF broadcast radio
" Complete with tribrach, adapter, short pole, 6AH battery
" Together with a Trimble Rover this RTK kit allows cm level position outside of GPS network and mobile areas.
" Optional repeater radio for long range work.
Instructional video for the Trimble R10 UHF Base