Godox Sy3000 Photo Studio Strobe Light Ac Slave Flash Bulb Light Control Trigger High Sensitivity Synchronous Electrical Flash Lamp High Quality! Brand New! The SY3000 AC Slave expands your capabilities without sync cables. It is an excellent complement to the Master AC Slave. A test button is provided. The AC Slave is triggered by a reliable built-in slave. It fits any standard 220V AC lamp base socket. They are ideal light sources for indoor photography. They have multiple edges such as great guide number, high sensitivity and quick charge and not disturbed by illuminating lamps, and can be used as key lights, filling lights, edge lights, top lights and footlights. This series of AC slaves have great power output, big indexes and ultimate durability. These lamps can work safely, stably and reliably even when the voltage of the transmission-line system of electric power waves. The lamp also has advanced flash remote sensing devices; therefore, they are able to receive pulsar flash at a long distance so as to automatically flash synchronously with signals. They are also featured in ideal color temperature and wide illumination angle, and work well if it is used together with umbrellas and umbrella reflectors.