Chart Projektor CP-33 IDB offers advantages as following: A total of 32 test charts A very quick test change (within 0.03 seconds) A specific children's test including contemporary pictures. Infrared remote control for comfortable operation. Red /green and polarising filters can be combined easily with other tests. Two test sequences can be programmed individually. Switches automatically into "Sleep" mode after 5 minutes without use. Saving energy and prolonging bulb life. Horizontal and vertical masks for presentation of selected optotypes. Can be supplied with wall mounting, refraction unit or stand mounting. Can be fitted to any refraction unit.