SP Studio Systems SP-72PCT Screw In AC Strobe with PC Cord 

The SP Studio Systems SP-72PCT AC Strobe with PC Cord is a workhorse that boosts or fills in with any electronic flash by means of its built-in slave. Fits a crowded camera bag on the road and takes on any number of chores in the studio. The SP-72PCT is also a perfect light source for copy stands.

It has PC socket that allows low voltage triggering directly from a camera sync terminal. PC cord is included, as well as test button.

Compact Design
Fits in hidden places on the set, perfect for using existing lamps in homes.
Built In Slave
Sensitive optical slave "sees" the light of another flash, triggers instantaneously.

SP Studio Systems SP72PCT Specs

Guide Number
72, in feet, ISO 100
Built-in Slave
Yes, optical
Modeling Light
None
Replaceable Flashtube
No
Voltage
120 VAC
Test Button
Yes
Dimensions
5 x 3" (12.7 x 7.6cm)
Weight
0.68 lb