• Firmware upgrades are available through usb service terminal• Works in conjunction with power ratio control feature to help better preview your lightning• Has a colour display which features an easily navigable menu• Has a wireless ttl and multi function remote control system allows this flash to control slave groups • Easy to use and reliable• Color: Black/White• Material: Polycarbonate• Dimensions(in Cm): 26.416 x 16.51 x 15.24• Weight (in Kg): 1.156661