The Morris AC Slave II expands your capabilities without sync cables. It is an excellent complement to the Master AC Slave. Green and red LEDs are mounted under the dome to indicate AC power and recycle status. A test button is provided. Our most popular flash unit, the AC Slave II is triggered by a reliable built-in slave. It fits any standard 110V AC lamp base socket. The guide number is 66 with ISO 100 film. It recycles in 4 seconds.