Viltrox Wireless E-TTL Trigger / High speed flash, 3-in-1 trigger for Canon, FSK 2.4 Ghz, incl. 2 x FC-210C wireless TTL trigger (tranceiver), 3 x connecting lines, mini flash stand), Mod. FC-210C Multi-functional 3-in-1 trigger: Can trigger 1. Speedlite flashes (hot shoe flashes), 2. Studio flashes 3. DSLR Cameras (3). So it is in fact 3 in 1 flash trigger. The key feature is the compatibility with 3rd party speedlite flashes, original Canon flashes as well as studio flashes - triggers hot shoe flashes / studio AC flashes. Supported Modes: Canon E-TTL, manual mode and multi flash. Sync Modes:1st curtain, 2nd curtain, Hi-speed sync. Groups control: 2 channels and 3 groups as A, B, C. Max. sync speed: 1/8000. All units are transceivers (can be either used as transmitter or receiver automatically - no need for separate receiver and transmitter). Front and rear curtain sync support, High speed sync support until 1/8000 shutter speed. Standard PC-Sync port for studio flashes. Effective range: 100 meters. Battery: 2x AA (NOT included!). Standby: 60h. Size: 706045mm. Weight: 79g