Rokinon D870AF-PK D870AF Digital TTL Flash for Pentax (Black) Guide Number: 26m/85ft; TTL Auto Focus Zoom Position: 35mm; Bounce Position:0-digree/30-digree/45-digree/60-digree//90-digree Recycle Time: 0.3-7 sec; Power Source: 4x AA batteries Power Saving Function Red Eye Reduction