???TheDF600 speedlight is a high-perdormance CLS-coppatible flash unit with a large guide number of 58(ISO 100， at the 105mm zoom position)， and the available zoom positions to be manually adjusted at standard illumination pattern intensity are between 24mm and 105mm. it can serve as an on-camera flash as well as a master unit or a slave unit in a wireless，multiple-speedlight system                                    Features            Power zoom function/memory function8 level light quantity output control LCD digital displayStandard PC synchronous portThe improved wireless tiggering sensor with S1 and S2 modes that can also be used outdoors， with wireless trigger farther distance                                                             Specifications            Flash Recycles    110-1500 times (AA alkaline cell used) 2. Guide NO.: GN58(at 105mm focal length， ISO 100)    <br>Flash Coverage    Manual /Auto zoom 24-105mm    <br>Wireless Mode    S1/S2 mode    <br>Voice    Beep    <br>Display Type    LCD display &amp; LED backlight    <br>Power Supply    4 x AA size batteries(Alkaline &amp; Ni-Mh &amp; Lion)    <br>Flash Time    1/200~1/20000s    <br>Recycle Time    approx 3s(AA alkaline cell used)    <br>Color Temperature    5800K    <br>Flash Control    8 levels light quantity output control(1/1~1/128， 28levels of fine tuning)    <br>Power Saving    Customize the standby function    <br>Dimensions    (14.6 x7.8 x 11.8)cm / (5.75 x3.07 x 4.65)" (L x W x H)    <br>Weight    641g / 22.61oz    <br>Compatible with    Canon EOS and Powershot series digital camera Nikon DSLR Nikon Coolpix series digital camera with hot shoe Pentax/Fujifilm/Samsung/RICOH DSLR Olympus Four Thirds digital camera Olympus Micro Four Thirds digital camera Panasonic Four Thirds digital camera Panasonic Micro Tour Thirds digital camera    <br>                                                            Package Includes            1 x Flash light<br>1 x Soft Bag<br>1 x User’s manual<br>