Yongnuo Upgraded 2nd. Generation flash YN-560 II, we added some new function and changed the apprearance a little based on 1st. generation YNNew added Features and functionNew LCD Display <br>We remove away from the battery of LEDs on the back panel to indicate vital information such as power level, zoom step and flash mode / slave mode, it's more clearly and directlyNew Multi Mode Function <br>YN560 II is the first Chinese full manual-flash with a multi mode. Multi mode is a second flash mode for YN-560 II, in addition to the full-manual mode M, and also in addition to the 2 full-manual slave modes S1 and S2 which cant be combined with the multi-mode option. <br><br>Multi mode allows firing a series of rapid flashes with a shutter release to produce a stroboscopic effect in the resulting picture. It's often used to show different phases of movement of aBMX cyclist, skateboarder or gymnast, for example, or any other object traveling through the framePower Low Indicator / Battery Warning<br>This feature can give you warning before it's too late, and not only after the power is out, it's also YONGNUO first full-manual flash with this functionNew Slave Sensor Cover Design<br>The flat, one-piece plastic screen has been replacedNew Button Material<br>The Same Features as the 1st. generation YNa), New Power zoom function: <br>You can push the button on the flash and make it covered focal length range from 24mm to 105mm.<br><br>b), Guide number: 58 at ISO100, 105MM<br><br>c), Slave functionmode): <br>You just can use YN-460 and YN-460 II in indoor and at a very weak light, but for YN-560 II, you can use it in outdoor environment, and the wireless triggering distance is as around 15m.<br><br>d), Sound Indicator: <br>When the charging process is finished, the flash will give a tich sound, so you may concentrate on the creation process. ( The sound can be closed )<br><br>e), New Charging socket for external power pack:<br>You can charge this YN-560 II to meet the higher demand for charging re