20 ft: COH (10 Line) Chart SC Replacement Wireless Remote Controller (only)

Replacement Wireless Remote Controller (only) for use with the ZOLL AED Plus Trainers

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20 ft: COH (10 Line) Chart SC Replacement Wireless Remote Controller (only)(9" x 14") Sloan optotype chart for vision testing at 20 feet. Features two smaller groups 20 25 to 20 12. 5 for repetitive eye testing. May be wall mounted or used with illuminated cabinets (66003, 66004, 66016, 66090). The Sloan optotypes were developed on the same basis as Snellen optotypes. Sloan optotypes do not use serifs however, but do use a logarithmic geometric progression.