• 2.4GHz operating frequency
• Manual output setting: 1/1 - 1/128
• Master/Slave Mode
• Net Weight: 3.5oz / 98g (without batteries)
• Dimensions: 3 1/6” x 2 9/16” x 2 7/16” (77.8mm x 65mm x 62mm)
• Power Source: 2 x 1.5V AA alkaline batteries, 2 x 1.2V NiMh batteries

• Multiple Channels
• HSS high-speed sync: TTL 1/8000
• 325’ range
• Functions as a transmitter or receiver
• AF assist beam
• Also works as a wireless shutter release (with additional cable)
• USB firmware upgradable
• Stand included

The following cables are available to expand the capabilities of the ST1

• ProMaster 6368 camera triggering cable for Nikon MC30 port
• ProMaster 6375 camera triggering cable for Nikon MCDC2 port
• ProMaster 6382 camera triggering cable for Canon RS80 port
• ProMaster 6389 camera triggering cable for Canon RS60 port
• ProMaster 3717 USB firmware downloading cable for computer connection