To pair the T2 Transmitter with the LightPix Labs FlashQ Q20II, make sure the transmitter is charged. Then follow these steps:
Turn on the transmitter by holding down the power button until a green light appears.
Turn on the flash.
Hold both buttons on the transmitter until it flashes blue. It is in pairing mode.
Hold the left arrow on the flash with the antenna icon next to it until the LEDs flash blue.
The flashing will stop when they are paired.
Have the flash in normal or modeling mode. The current mode is indicated by the LED color. If the LED is off, the flash is in normal mode.
Product page: https://www.lightpixlabs.com/pages/q20ii