The Sunpak PZ42X Flashgun supports the TTL light control system for the latest digital Sony SLR cameras (ADi & P-TTL). The unit is compact & lightweight & offers easy & simple operation via the LCD display. Main features include a bounce & swivel head, switchable focal length display between APS-C & 35mm, manual control over power output & a seven step EV adjustment (+/-1.5EV). Powered by four AA batteries the unit recycles in around 3.5 secs.