Radio Shack AM/FM Stereo Cassette Player with Auto Reverse Owner's Manual page 25

Frequency Response .... ±6 dB, 125–6300 Hz
Signal-to-Noise Ratio ............................ 45dB
Wow and Flutter (WRMS) ................... 0.25%
GENERAL
Power Requirements ..................... 3 Volts DC
12V DC with optional DC Adapter
120V AC with optional AC Adapter
Battery Life .............. Approximately 12 Hours
1
Dimensions (HWD) ....... 5
(129
Weight (Without Batteries) ..... 9.3 oz ( 264 g)
Specifications are typical; individual units
might vary. Specifications are subject to
change and improvement without notice.
Specifications
(Two AA Batteries)
1 7
/ 3 / 1 / in
16 3 16
85 37 mm)
25