This Flash cable is our product PB820 power pack ’s accessory. This item is the PB820 power pack flash cable for Canon 430EZ,540EZ,550EX,580EX,580EX2 and other flash model with same type of input power port
  Some flashes require that you install AA batteries into the battery compartment for powering the computer circuits

Features:
High quality and durable to use, stand wear and tear, highly-insulating,and of good material
Lightweight and portable, convenient to carry
Suitable for Canon 430EZ,540EZ,550EX,580EX,580EX2
Flashlight battery is needed
Round aluminium alloy connector for flash battery pack

Plastic flat connector, three holes, easy to operate

Flashlight power is needed to turn on, it can work
Length: 80cm
Max.Length: 170cm

Package contains:
1 x Propac Cable for Canon
1 x User Manual