This wireless trigger is an economic radio remote system for camera to trigger hot shoe flashgun synchronously.

• Channel: 4 Control Channels
• Frequency: 433MHZ
• Control Rage: Up to 20 meters (open area without interference)
• Shutter Sync Speed: Up to 1/250th second
• Transmitter Battery: 23A 12V small battery (included)
• Receiver Battery: 2 x AAA battery (not included)
• Operating temperature: 5 ??C to 40 ??C (40 ??F to 105 ??F)
• Trigger times: 30,000
• Trigger current: 0.01mA
• Transmitter standby time: >over 1 year (with a new battery)

Compatible with following flash units:

• Canon: 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EX, 430EX II, 430EZ, 420EX, 420EZ, 380EX...
• Nikon: SB-900, SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24
• Pentax: AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT
• Olympus: FL-50, FL-40, FL-36
• Vivitar: 285HV (Older Vivitar 285/283 works only with PC sync)
• Jessop: 360AFDC
• Metz: 50AF-1

NOTE: The trigger set isn't compatible with Nissin flash units (except Nissin Nikon fit with firmware upgraded). Also, Please make sure you turn off your flash unit before it's mounted onto this trigger set.