Features External power pack connection cable to speedlite. Made by high quality material, abrasion resistance, high insulation. Suitable for flash battery pack PB960 and PB820. Cable can extend up to 1.5m. Fits for Canon speedlite 600EX, 550EX, 580EX II, 430EZ, 540EZ, 550EXand other flashmodel with same type of input power port. Specifications: Type: CX Power Cable Color: Black Length: 50cm (not extended); 1.5m (extended) Package size: 11 * 8.5 * 5.5cm / 4.4 * 3.3 * 2.2in Package weight: 125g / 4.3oz Package List: 1 * CX Cable 1 * User Manual (English) Note: This CX Cable can only work with our POWER PACK (D1157 & D1158) , so please make sure you have bought the POWER PACK (D1157 & D1158)before you place an order.