Quantity: 1 - Color: Black - Material: Plastic - Compatible camera model: 580EX II / 580EX / 550EX / MR-14EX / MT-24EX Nikon SB-11 / SB-20 / SB-24 / SB-25 / SB-26 / SB-27 / SB-28 / 28DX / SB-80DX Sony HVL-F56AM - Flash times: About 250 (Alkaline battery) / 200 (Ni-MH battery) / 700 (Lithium battery) - Recycling time: 0.2~5 second (Alkaline battery) / 0.2~4 second (Ni-MH battery) / 0.2~7 second (Lithium battery) - Use 8 x AA batteries (Not included) - Improve speedlite continuously working ability - Packing list: - 1 x Battery pack (Retractable cable length: Max. 120cm) - 1 x Carrying pouch - 1 x Installation part - 1 x Chinese / English user manual