"Plus"-version means:

With integrated haptic module (vibration module)
With improved lateral sliders
New dual-color-LCD-display
Prepared for 6-position rotary potentiometer (sold separately)

Features:
Up to 16 channels
Four ball bearing gimbals
Two-module Two-frequency system
two selectable modes
Super lower latency (approx 1/3 of current systems) and higher presision
Receiver Match und RSSI
Smart Port

Equipment
big dual-color LCD backlight grey-scale display (212 x 64)
USB connection
SD Slot
Audio speech outputs: values, alarms, setting etc.
Open Source Operating System

Two-module Two-frequency system:
One internal module plus one external JR module slot

Mode:
D16 (16ch full duplex telemetry)
LR12 (Long Range)
Super lower latency:
Up to 60 percent faster than previous systems with higher precision.
Receiver Match and RSSI
Transmitter recognition memory (no control with the wrong program possible)

Delievery:
Taranis X9D - plus Transmitter with 2000mAh Accu (Mode 2)
X8R Receiver
Charger for Transmitter
Neck Strap
Aluminium Case
Compatible with FrSky Receivers: XSR/LBT, X4R CPPM/LBT, X4R-SB CPPM/LBT, X6R/LBT, X8R/LBT, L9R/LBT, S6R/LBT

This product conforms to the current radio standard ETSI EN 300.328.V1.8.1. Thus, compatibility is not the case with older FrSky receivers! Please perform when required by an update of the receiver to the latest firmware.