GVM-S200 flash is a wireless TTL flash with built-in 2.4G wireless G system, with this G series trigger can remotely control the function of TTL/M/Multi mode of GVM-S200 flash; at the same time, it can also used in combination with the TTL master-slave function flash, TTL Outdoor flash light and the TTL studio light. With the GVM-S200 flash, you’ll get a simpler shooting experience with complex lighting changes. Accurate flash exposure is automatically obtained for easy shooting.