Silent Call 1008-4 - Manual (Page 28)

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Specifications
Power Source: One 3-volt CR123A Lithium Battery (included).
(Replace with Duracell DL123A, Panasonic CR123A)
Height: 2.3 inches (58 mm)
Diameter: 5.3 inches (135 mm) (with mounting base)
Weight 8.5 oz. (241 g) (without battery)
Operating Ambient Temperature Range:
32° to 100°F (0° to 38°C)
Operating Humidity Range:
0% to 95% Relative Humidity
REV APRIL 2010