[. . . ] T Use the unit away from radiowave-emitting devices such as cellular phones. AC power adaptor (not supplied) Connect the AC power adaptor to DC IN 3V and to a wall outlet. [. . . ] After fast forward or rewind, be sure to set mCUE/ MREVIEW back to the center. Use a microphone of low impedance (less than 3 k) such as ECM-T6 (not supplied). When using a plug-in-power system microphone, the power to the microphone is supplied from this unit. note When recording with an external microphone, the VOR system may not work properly because of the difference in sensitivity. To clean the tape head and path Press n and wipe the head, capstan and the pinch roller with a cotton swab, moistened with alcohol every 10 hours of use. 2 Insert two R6 (size AA) batteries with correct polarity and close the lid. 24 mV for 3 k or lower impedance microphone Output Earphone jack (minijack) for 8 ­ 300 earphone Power output (at 10% harmonic distortion) 250 mW Power requirements 3 V DC batteries R6 (size AA) × 2/External DC 3V power sources Dimensions (w/h/d) Approx. 109 g (main unit only) Supplied accessories Microcassette tape MC-30 (1) Batteries LR6 (SG) (2) (M-455 only) Design and specifications are subject to change without notice. Connect another tape recorder to the MIC jack using the RK-G64HG connecting cord (not supplied). Set this unit to the recording mode and another tape recorder to the playback mode. 4 cm tape speed for recording, if you play back the recorded tape with another unit. Non-standard cassettes cannot be used because their "L" dimension (see illustration) is different. [. . . ] When you do not use the unit for long, remove the batteries to avoid damage caused by battery leakage and subsequent corrosion. If the unit has not been used for long, set it in the playback mode and warm it up for a few minutes before inserting a cassette. [. . . ]