... : 30m New WANSEN PT-04GY Wireless Flash Trigger for canon nikon Pentax Olympus camera Specifications:4 channels with hot shoe connector for external ... time: one yearTriggering life: up to 20,000 times Compatible with:Canon SpeedLite 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EZ,430EX ... ;Vivitar 285HV, DF-400MZ, DF-340MZ, 2700;Other flash models with a trigger voltage of 12V or lower Package included:1 ...