Purchased two have only bind one so far and works flawlessly... everything I’ve purchased from rotor Riot have worked perfectly
FrSky X4R-SB - RX w/ SBUS
The FrSky X4R-SB is the perfect companion for the FrSky Taranis. Smaller than a matchbox and lighter than a lighter (ba dum tsss), it’s packed with features that make it the most logical choice for a serious multirotor pilot. With extended range and increased reliability, you’ll be able to fly farther without glitches. If you do get near the range limit, a low signal alarm will make sure you don’t lose your quad.
One of the key features that make this receiver stand out - the ability to transmit telemetry data such as battery voltage, amp draw, and other aircraft information back to the radio in your hands. This is especially useful for FPV pilots when combined with the FrSky Taranis’ spoken feedback system.
More information on the Taranis here: http://store.rotorriot.com/frsky-taranis-q-x7-transmitter-radio-fpv-drone/