This PB-SX Power Connect Cable is a Godox PB820 / PB820s / PB960 Lithium Battery Pack Accessory Kit it allows you connect your Flash Speedlite to Godox External Battery Pack for Continuous Photography This Cable featured a 50cm Extendable Coil Cable Maximum Length up to 18 meters Compatible with: Sony HVL-F58AM HVL-F56AM Flash Speedlite Also it compaitble with other flash model with same type of input power port Note: This PB-SX Power Cable Needs you Switch off Flash to Normal use Package Included: 1 x Godox PB-SX External Battery Pack Power Cable