Receiver / Transmitter remote control (watch seller had forgotten the cable needed for me).
They work very well with all of my flashes. They even when mounted on the device to support a flash unlike other trigger.
Only defects found, once the flash mounted, access to the On / Off button is not possible. Impractical when put in place to conserve battery power.
Otherwise RAS. Very satisfied, the price and quality are very good for those who would like me to start retissant to Chinese products.