RadioMaster Zorro Transmitter 
Physical dimensions：170*159*108mm
Weight：350 grams
Operating frequency：2.400GHz-2.480GHz
Internal RF Options：CC2500 multi-protocol / 4-in-1 multi-protocol / ELRS 2.4GHz
Supported protocols ：Module dependent
RF power：CC2500 and 4-in-1: 20dBm max. / ELRS: 22dBm max.
Antenna gain：Folding 2db
Operational current：160mA@8.4V
Operational voltage：6.6-8.4v DC
Control distance：> 2km @ 20dbm
Operating system：OpenTX / EdgeTX Compatible
Control channels：Maximum 16 (Rx dependent)
Display ：128*64 Monochrome LCD
Battery ：2 x 18350 (Not included)
Charging ：Built in USB-C Charging
Gimbal：Hall-effect
Module bay ：Nano size (Compatible with TBS Nano Crossfire / Nano Tracer / IRC Ghost)
Firmware Upgrade method：Via USB or SD card (SD Not included)
Radio Firmware:
https://www.open-tx.org/
http://edgetx.org/
RF Firmware
CC2500 & 4-in-1 Multi-module https://www.multi-module.org/basics/supported-protocols
ELRS : –https://github.com/ExpressLRS/ExpressLRS