CTR-88 (140-1103) Specifications Faxback Doc. # 6209 Tape System:..................................2-Track, Monophonic Cassette Tape Speed:........................................1-7/8 ips (4.75 cm/sec) Wow and Flutter:..............................................0.25% (WRMS) Signal-to Noise Ratio (Recording):.............................33 dB (RMS) Erase System:.......................................................Magnet Record System:.....................................................DC Bias Tape Type:..............................................Normal Bias Type 1 Power Requirements: Internal Batteries:.............................Two AA Batteries (3 V) AC Power:...............................................120 Volts with 273-1654 AC Adapter Vehicle Battery.:........................................12 Volts with 270-1560 DC Auto Adapter Approximate Battery Life (Alkaline):.......................12 Hours of Use Dimensions (HWD):........................3-11/16 X 4-13/16 X 1-9/16 inches (89 X 122 X 41 mm) Weight:.....................................................8.1 oz (230 g) Accessory:........................................................Earphone (RLR/smc-05/18/94)