The Diascop 50N Stack Viewer with 3x Lens from Kaiser is a slide viewer with a 3x magnifying double lens suitable for 35mm framed slides and uncut film strips, The unit comes with a change slider for convenient slide changing without annoying bright intervals. The built-in drop chute holds up to 40 slides. The top section is tiltable for adjusting to your preferred viewing angle. Includes AC power cord.