RadioMaster Boxer Radio Controller 2 4GHz Transmitter 4 in 1 Multi Protocol CC2500 ELRS Remote Controller EDGETX Open System for FPV Racing Drone Quad RC Airplane HelicopterThe perfect combination of size and ergonomics make the BOXER an ideal choice for pilots on the go Featuring full size hall gimbals for precision control and an intuitive button layout the BOXER gives you a compact radio without compromising on comfort and function SpecificationItem BOXER RadioSize 235 178 77mmWeight 532 5gFrequency 2 400GHz 2 480GHzInternal RF Options CC2500 multi protocol 4 in 1 multi protocol ELRS 2 4GHzSupported protocols Module dependentTransmitting Power CC2500 and 4IN1 Max 20dBmTransmitting Power ExpressLRS Max 30dBm international Max 20dBm EU LBT Cooling fan Built in ELRS version Voltage Range 6 6 8 4V DCRadio Firmware EdgeTX Transmitter Multi Module RF module ELRSChannels Max 16 channels Receiver dependent Battery 7 4V 2 cell Lithium Polymer Two 3 7V 18650 Lithium Ion cells batteries not included Display 128 64 Monochrome LCD displayGimbal High precision 4 0 Hall gimbals as standard AG01 Optional External module JR FrSKY Crossfire compatibleUpgrade Method USB SD cardEdgeTX Companion PC softwareFeatures Available with built in ExpressLRS or 4 in 1 CC2500 MPM RF module Featuring a powerful STM32VGT6 processor with 1MB RAM Preinstalled EdgeTX firmware Internal ELRS module capable of 1 000Hz refresh rate Adjustable ELRS RF output