Specifications IC recorder section Capacity (User available capacity) ICD-UX71/UX71F: 1 GB (approx. 986 MB =1,034,354,688 Byte) ICD-UX81/UX81F: 2 GB (approx. 1.92 GB =2,072,313,856 Byte) ICD-UX91F: 4 GB (approx. 3.86 GB =4,147,806,208 Byte) A part of the memory capacity is used as a management area. Recording time*1 See page 27. *1 When you are going to record continuously for a long time, you may have to replace the battery with a new one in the midst of recording. For details on the battery life, refer to pages 15 - 17 . Frequency range  ST : 40 Hz - 20,000 Hz  STSP : 40 Hz - 15,000 Hz  STLP : 60 Hz - 7,500 Hz  SP : 60 Hz - 10,000 Hz  LP : 60 Hz - 3,400 Hz Bit rates and sampling frequencies for MP3 files*2 Bit rate: 32 - 320 kbps, VBR Sampling frequencies: 16/22.05/24/32/44.1/ 48 kHz *2 The playback of MP3 files recorded using the IC recorder is also supported. Not all encoders are supported. Bit rate and sampling frequencies*3 for WMA files Bit rate: 32 - 192 kbps*4, VBR Sampling frequencies: 44.1 kHz *3 WMA Ver. 8 Class2A is compatible, however, MBR (Multi Bit Rate), Lossless, Professional, and Voice are not supported. *4 The NoiseSubstitution function is not supported, therefore, playback becomes simple playback with 32 kbps bit rate. FM radio section Frequency range 87.5 - 108 MHz IF 150 kHz Antenna Headphone cord antenna Speaker Approx. 10 mm dia. Power90 mW output Input/Output  Microphone jack (minijack, stereo)  input for plug in power, minimum input level 0.9 mV, 3 kilohms or lower impedance microphone  Headphone jack (minijack, stereo)  output for 8 - 300 ohms headphones  USB connector  High-Speed USB compatible Playback speed control (DPC) +100% to –50% (MP3) 0% to –50% (WMA) Power requirements One NH-AAA rechargeable battery (supplied): 1.2 V DC One LR03 (size AAA) alkaline battery (not supplied): 1.5 V DC Operating temperature 5 ̊C - 35 ̊C Dimensions (w/h/d) (not incl. projecting parts and controls) (JEITA)*5 34.4 × 99.0 × 13.4 mm Mass (JEITA)*5 Approx. 48 g including NH-AAA rechargeable battery *5 Measured value by the standard of JEITA (Japan Electronics and Information Technology Industries Association) Supplied accessories See page 7. Optional accessories Active speaker SRS-T80 Electret condenser microphone ECM-CS10, ECM-CZ10, ECM-DS70P, ECM-DS30P, ECM-TL1 Audio connecting cable RK-G136, RK-G139 (excluding Europe) Rechargeable battery NH-AAA-B2F USB AC adaptor AC-U50A, AC-U50AD Battery charger BCG- 34HE4