An external power source for Nikon flash gun SB-900 SB-910<br />Provides increased external power to your Nikon flashes<br />Reduces flash recycling time and increases the total number of flashes<br />Powered by 8 AA batteries (not included)<br /><br />Features: <br />Protective Design - Included protect case which is available to hold on the belt or bags; easy to carry; the connecting plug anti-wrong insert design; Avoid misusing to affect the flashlight system;<br /><br />Performance - Through the test, the external battery pack can reduce the recycling time. The recycling time is about 50% less than that of the original; also it double-times increased the flash as original. Very suitable to use in continuous flashes;<br /><br />Much Useful - This product needs to insert 8 new AA batteries (Same battery type as the flash unit), and greatly increase the flash light working. This is the best for the professional person. <br /><br />Note: Batteries NOT included<br /><br />1x Portable External Battery Pack<br /><img src="http://img6.eachbuyer.com/x9/p100/cp949_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_5.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_6.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_7.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/cp949_8.jpg" />