Aputure TX1S Flash Trigger for Sony DRSL Camera:A560, A580, A290, A390, A450, A55, A500, A850, A350, A300, A200, A700, A100 1.Can Awaken most Branded Speedlights, e.g. Canon, Nikon, Sony, Olympus. 2.Long Range up to 120m at any Angle, no Misfire within 80m. 3.Ultra-fast microchips enable sync speed of 1/250 seconds. 4.2.4G Radio Frequency, More Stable and Sensitivity. 5.Transmitter and Receiver built-in-one.