- Built-in Bluetooth for app control: Connect this flash trigger to your mobile phone or tablet via Bluetooth after downloading the Photo app. You can control flash mode, output power, lighting mode, and status beeps, providing convenient and flexible operation. - TTL automatic flash and professional functions: TTL automatic flash with 1/8000 s high speed sync, multiple flash modes, manual flash, flash exposure compensation, scan setting, single and multiple flash options, and control of the setting lamp. You can set all groups' output values at the same time for consistent lighting. - Effectively avoiding signal interference: 5 groups, 32 channels, and access to 99 WiFi ID settings to limit interference from nearby systems. Note: Only if the channels and radio IDs of the master and slave units are identical can they be triggered. - User-friendly design and easy operation: LCD display for clear readouts; 5 group adjustment buttons and 3 function buttons for quick control; hot shoe mounting and quick-release hardware for fast setup. Use scenarios - Studio portrait photography: Use TTL and high speed sync to maintain correct exposure while working with multiple light sources from different angles. The 5 group control lets you balance key, fill, and rim lights precisely. - On-location product shoots: Adjust lighting remotely via the Photo app on your phone or tablet, reducing the need to move between lights and cameras during a shoot. - Event and wedding photography: Manage multiple lights across locations and avoid interference with other wireless gear by selecting different channels and WiFi IDs, while keeping all group outputs synchronized for consistent results.