Buy from Amazon.com : http://fave.co/1MGsFj3 <br /><br />Manual Speedlight with Optical Slave- Powerful Flash for Off-Camera Lighting with 2 Wireless<br /><br />Product Description : <br />Full Power Guide Number 105 ftISO100 power adjustment in 17 F-stop increments <br />270 degree head rotation <br />Appropriate for strobists <br />Includes pop-up reflector card drop down diffuser <br />Requires 4 AA batteris that yield about 150 full power flashes
