This Benchtop Transilluminator can easily view gels under longwave for extended periods of time avoiding photonicking damage. Researchers can switch to midrange to increase the fluorescence for photo-documentation. Shortwave is used to irradiate samples. 2UV models provide longwave and midrange UV. All Benchtop Transilluminator models are compact and lightweight units. These 8-watt models provide a low cost alternative to the High Performance UV Transilluminators. A variety of filter area work surface sizes are available. Clear UV blocking cover included with each transilluminator. Dimensions: 11"D x 14"W x 5"H (279 x 356 x 143mm) Height includes UV blocking cover. Filter Size: 21 x 26 cm. Wavelength: 302/365 nm. Intensity Style: Single. WARNING: Transilluminators are powerful sources of ultraviolet radiation which can cause serious damage to unprotected eyes and skin. Read the ultraviolet Caution Information before operating any transilluminators. UVP#: 95-0459-02.