SPECIFICATIONS Track system: Micro cassette, 2 tracks 1 channel, monaural Usable tapes: (Normal position type) Frequency response: 250 - 5,000 Hz (2.4 cm/sec) EIAJ Tape speed: 2.4 cm/sec or 1.2 cm/sec switchable Microphone Electret condenser Microphone (monaural) Maximum output: 110 mW (EIAJ/DC) Output jack: EARPHONE jack (monaural mini-jack) (1) Other jack: DC 3 V jack Speaker Diameter 36 mm, 4 ohms Recording system: DC bias Erasing system: Magnet erasure Power sources: DC 3 V using two size AA (R6) dry cell batteries AC house current using the AC adaptor Aiwa AC-302 Battery life: Battery Battry life EIAJ Recording Dimensions: Weight: Manganese(R6P) batteries Approx. 7 hrs. Alkaline(LR6) batteries Approx. 24 hrs 63.8 (W) x 121(H) x 25.7 (D) mm (2 5/8 x 4 7/6 x 1 1/16 in) Approx. 116 g (4.1 oz.) (excluding batteries)