1. X2 series TTL wireless flash trigger can work with camera flashes, outdoor flashes and studio flash which built-in X wireless radio system. X2 achieves stable, reliable and effective real-time signal transmission which makes it a good choice for photographers who have various lighting demands 2.Using your iPhone/Android-based cell phone, or Android-based tablets to connect the X2 via bluetooth after downloading the 'Photo' APP, you can control the flash mode, power output, the modeling light mode, the beep of the flashes, and etc. 3.Large LCD with clear display effect, Design with 5 dedicated group button and 3 function button to achieve quick settings. You can easy access 5 group, 32 channels, 99 radio ID settings to prevent interference from other nearby systems. 4.Fully support TTL autoflash, 1/8000s high-speed sync, multiflash mode, manual mode, flash exposure compensation, adjusting the lighting parameter through the mobile APP, scan setting, one-shot and multi-shot setting, control of the modeling lamp, adjusting all groups' output value simultaneously, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.