ADVANCED WIRELESS FUNCTIONS: Incorporated 2.4GHz makes it easy to shoot with advanced wireless multiple flash lighting, in the same way as TTL auto-flash shooting when using several flash units.Multi-angle and multi-directional photography setups are simple since flash units don’t need visual proximity to one another. The RT-305 manual Flash trigger enables wireless transmission with a manual set up, it does not support TTL mode. | WIRELESS MANUAL TRIGGER: The RT-305 manual wireless Trigger has 16 channels for communication. NOTE: When using the RT-305 manual wireless trigger with the AP-305 Flash, HSS and TTL are not supported and flash sync speed will work up to 1/250s. HSS and TTL are only available when using one or more of the AP-305 Flash. | COMPACT, LIGHTWEIGHT WITH PROFESSIONAL PERFORMANCE: Same professional power in a 30% lighter package. Includes One Altura photo AP-305C Speedlite Flash for Canon + One RT-305 Manual Wireless Trigger + Mini Stand + Protective Pouch. | FLEXIBLE MODES: TTL, Manual (M), and Multi (Stroboscopic) modes offer the versatility to achieve a correct flash exposure even in complex light-changing environments. | WIDE RANGE FLASH COVERAGE: The AP-305C Speedlite has a guide number of 36m/118 ft. at ISO 100 to help achieve the lighting you desire. Great for DSLR, Mirrorless and Off Camera Photography. Compatible with all Canon cameras, including; Canon EOS Rebel T7i, T6i, T6, T6s, T5i, T5, T4i, T3i, SL2, SL1, 90D, 80D, 77D, 70D, 700D, 650D, 600D, 550D, 7D Mark II, 6D Mark II, 5DS, 5D, 1D Mark II, M3, M5, M6, M10, M50, M100, M200, R, RP.