Interfit Stellar 300 Watt XD Softbox/Umbrella Kit is more suited to portrait and fashion work or more detailed product photography. Chose this combination kit when you need close attention to detail with product photography. Fan cooling ensures that the flash capacitors and associated circuitry are kept to their optimum working temperature even during periods of prolonged use. User changeable German flash tubes ensure both long life and colour consistency. Auto Power Dumping, thermal cut-out devices and greater air flow around the capacitors offer professionals these most desirable tools. The rear control panel houses user friendly controls that allow not only the flash and modelling lamp intensity to be set but also the switches that allow the choice of audible or silent recycling indication and proportional or full power modelling lamp setting. Other features that are important to the busy professional include 'S' type bayonet fitting reflectors and accessories allowing a wide range of Interfit accessories to be fitted. Sensitive infrared and flash sensors and five f-stop stepless adjustment of both flash and modelling lamp, fast re-charge coupled with audible and visual 100% recharge indicators add to the ease of use.