JINBEI TR-Q7II Universal Hot Shoe TTL HSS High-speed SYNC Flash Trigger Transmitter for HD2PRO/HD610PRO/400PRO/MSNPRO/200PRO
TR-Q7II is high speed transmitter, used for high speed studio flash, like MSNpro/PIIIpro studio flash, HD-2pro speedlite, HD-200pro/HD-400pro/HD-610pro/HD-601 battery monolight
TR-Q7IIS is for sony, if your camera belong to sony brand, please buy Q7IIS
TR-V6 is used for normal studio flash, like SPARK 400D/DMII/DPX/DPEII studio flash