Pixel TD-384 battery Power Pack for Sony flashgun HVL-F58AM HVL-F56AM, replaces Sony FA-EB1AM, extremely stable fast recycle time TD-384 is a power pack for Sony flashgun Using two groups of symmetrical charge system, its more stabile charging voltage and faster recycles time Stand-by power consumption is more save and recycle power compare with similar product Flexible and convenience to use choose charging with one or two group freely