Jumper just upgrade the Jumper T12 to Jumper T12 Pro Hall sensor gimbal. The following picture show you the improvements:

T12 Pro Main Features:
JP4-in-1 Multi-protocal module included. Compatible with DSM2/X, FrSKY, SFHSS, FlySky, FlySky AFHDS2A, Hubsan and etc
OpenTX firmware
Multi-protocol transmitter module internal with TBS CRSF support
JR/FrSKY compatible module bay on rear side.
USB online firmware upgrade
Ultra-low power consumption, longer battery life
Up to 16 channels of output (depending on the receiver)
Wide voltage input (2s lipo recommended)
Vibration reminder function
Support telemetry (depending on the receiver)
LUA Script support: Yes

Specifications:
Item Brand: Jumper
Item Model: Jumper T12 Pro
Size: 158 * 150 * 58
Weight: 342g (without battery)
Working voltage: DC5-DC9V (factory with 4 * AA battery box, 2s Lipo recommended, batteries notincluded)
Firmware: OpenTX
Channels: up to 16 channels (depending on the receiver)
Display: 2.4 inch LCD display, 128* 64 resolution
Gimbal Type: HALL Sensor
JR/FrSKY compatible module bay on rear side
Upgrade method: USB online upgrade
Simulator mode: 3.5mm standard ppm output or USB HID

Package Included:
Jumper T12 Pro OpenTX transmitter x 1
Neck strap x 1
USB cable x 1
User Manual x 1