X2T-O TTL wireless flash trigger - 2.4G wireless X system with up to 100 metres operating range. Designed to work with a wide range of camera flash units and off-camera configurations. - Compatible flash models include V1, SK300/400II, TT350, TT600, TT685, V860II, AD200/AD200Pro, AD400Pro, AD600BM, AD600B, and AD600Pro. Enables reliable TTL off-camera flash control with these flashes. - Bluetooth function for mobile control: use the Photo APP on iPhone, Android phones, iPad, or Android tablets to connect to the X2 via Bluetooth. You can adjust flash mode, power output, setting light, buzzer, and other settings from your mobile device. - User-friendly design for fast setup: 1) LCD display with clear readouts, 2) five group setup buttons, 3) three function buttons. Supports five groups, 32 channels, and 99 wireless ID settings to minimize interference from nearby systems. - Professional capabilities: compatible with Olympus and Panasonic cameras, with firmware updates possible via a Type-C USB cable. The trigger is operated via a 3.5 mm sync cord jack for wired control when needed. - Practical use scenarios: - Outdoor portrait sessions: use multiple off-camera flashes across several groups to shape lighting precisely, with Bluetooth control for on-the-fly adjustments from a smartphone. - Studio/product photography: leverage the five groups and 32 channels to fine-tune light ratios and power levels, keeping setup organized and interference-free. - Event coverage: quickly adapt lighting during shoots with the Bluetooth app and reliable TTL triggering, while maintaining a wired backup option via the 3.5 mm sync cord. - Size and build notes: designed as a compact TTL wireless trigger for compatible Olympus/Panasonic flash units and other supported models, with straightforward, dependable operation.