The guide number is 328 as per the model designation. It bounces, zooms and swivels. The flash comes complete with a bracket. This unit is compatible with all digital cameras with either built-in flash capability or not. It has a hot shoe so that it can be fired from the camera too. It is fully synchronized with fill-in flash and red-eye reduction flash and can be used with virtually all of the digital cameras on the market. It works as a slave. It can be set for a single flash camera or a pre-flash camera, or, it can detect which setting is best.In addition to its digital pulse counting slave circuitry, the Slave Flash comes equipped with a built in hot shoe, quick release mounting bracket and pc sync cord. The Slave Flash is compatible with virtually any digital or film, point- n'- shoot or SLR camera you might own.

Specifications
Brand: BOWER
Guide # ( 50mm @ ISO 100 ) :92
Auto : ISO 100 f/ stop 2.8 in " S " Position
Auto Distance Range : Approx. 3.3? - 38? ( ISO 100 - " S " Position )
Mode Selector Switch : ( 3 Positions ) - N, S1 & S2
Zoom Range ( 4 Positions ): W1 28mm - W2 35mm - S 50mm - T 85mm
Slave : Yes
Bounce Angle : 0? - 90?
Swivel Angle : 0?- 330
Angle Of Coverage : Horizontal 60? , Vertical 45?
Ready Light : Yes
Flash Duration : (sec.) 1/1,000 - 1/20,000
Color Temperature : 5600? k
Power Source : 4AA Batteries Or NiCad Equivalent Or NiMH
Recycling Time : 6 sec. ( With Alkaline Batteries ), NiCad / NiMH 4 sec. Approx.
X-Synch Voltage : ? Or = 6V
Dimensions : L 2.75? x H 5.25? x W 1.9?
Weight (w/o batteries) : 7.4 oz.