Neewer 5500k 2.4G Wireless Professional Speedlight Flashlight NW TT660 II with Flash Diffuser for Canon T5i T4i T3i T2i T1i SL1, EOS 700D 650D 600D / EOS Rebel T3i, 550D / Digital Rebel T2i, 500D / Digital Rebel T1i, 100D Nikon D3300 D3200 D3100 D3000 D5200 D5100 D5000 D7000 D710, Pentax K-m, K-r, K-x, K-01, K-5, K-7, Olympus E-M1, E-M5, E-P3, E-P5, E-PL3 and all other SLR DSLR CAMERAS Professional Photograph with Universal Hot Shoe The second generation of TT 66, which Built-in 2.4G ultra-long-distance wireless flash system, global free application for digital FSK 2.4GHz & Ultra-long-distance wireless transmission module, communication distance up to 5 meters. The lead flashing distances up to 5 meters / 164 feet above. Large-size LCD display. The NW TT66 II is equipped with large-size LCD screen, with clear and intuitive view, easy to use. New Power Zoom Function: By pushing the button on the speedlite, it can make the flash covered length range from 18mm to 18mm. The High Sensitivity Wireless Triggering Sensor: The high sensitivity wireless triggering sensor inherits from TT66, which makes the Slave function ( S1, S2, RX mode). New Charging Socket for External Power Pack: NW TT66 II provides charging socket for external power pack, to meet your higher demand for charging recycle.