Featuring multi-channel triggering, stable signal transmission, and sensitive reaction, Godox TTL wireless flash trigger X1 can be used to trigger camera shutter, studio flash and camera flash. Built-in 2.4G Wireless Transmission Built-in 2.4G wireless transmission provides 100 further transmission distance and creative triggering methods. • Fully Supporting TTL Functions Support for TTL auto flash, manual flash, multi flash, 1/8000s HSS, flash exposure compensation, flash exposure lock, modelling flash, etc. • Wireless Remote Control and Grouping System With GR group flash and wireless grouping system (max. 5 groups & 32 channels) and triggering the flash. • Big and Clear LCD Panel Transmitter and receiver both have backlight LCD panel to offer convenient operation. • More Functions Versatile functions such as synchronization delay setting, wireless shutter release, zoom setting, etc. PC sync socket to input and output; receiver use 2.5mm sync cable to output. USB firmware upgrades helps keep pace with the latest technology. Useful memory function that settings will be stored 2 seconds after the last operation and recover after a restart.