JR Propo T14X4 CNC Machined Gimbals Chrome Radio Transmitter - Mode2 / Without Battery

The transmitter is designed for a 6.4V 1400mAh Lithium Iron (Li-Fe) battery pack, which is included. While the input voltage from the external 9V DC adapter provides a wide range, using a standard 2S LiPo (7.4V) directly is not recommended as it may exceed the designed voltage tolerance of the internal circuitry and could cause damage.

The T14X4 utilizes the XBus serial protocol. Each of the 14 physical channels can be assigned to control a 'bus' of up to four individual servos via compatible XBus receivers, like the JR/DFA RG812BPX. This serial communication allows for complex, high-channel-count setups without requiring a physical PWM port for each servo.

Yes, but indirectly. You will need a compatible JR DMSS receiver (not included) connected to your flight controller. The receiver outputs standard PWM or serial protocol (like SBUS, if supported by the specific receiver model), which can then be wired to your flight controller's RC input pins for use with Betaflight, ArduPilot, or other firmware.

Primarily, the SD card slot is for expanding model memory storage and backing up model settings. Firmware update procedures for JR Propo transmitters typically require specific tools and files from the manufacturer; refer to the official JR Propo manual or support channels for confirmed firmware update methods for the T14X4 model.