Power source AC 110 – 240 V 50/60 Hz (MD-DR480H), AC 230 V 50/60 Hz (MD-DR470H) DC 1.2 V (Rechargeable Ni-MH battery: AD-N55BT x 1), DC 1.5 V (AA battery x 1), DC 5.0 V (AC adaptor) Power consumption 0.15 A with AC adaptor (MD-DR480H), 7 W with AC adaptor (MD-DR470H) Error correction ACIRC (Advanced Cross Interleave Reed-Solomon Code) Audio compression ATRAC/ATRAC3 (Adaptive Transform Acoustic Coding), 24-bit computed type Frequency response 20 to 20,000 Hz (±3 dB) Wow and flutter Below measurable limits (±0.001% W) D/A converter 1-bit converter Modulation system EFM (Eight to Fourteen Modulation) Terminals Earphones, Line/Optical input, Mic. input, DC input Dimensions 78.9 (W) x 17.8 (H) x 71.9 (D) mm Weight 140 g with rechargeable battery Included accessories Recharging station (MD-DR480H), LCD remote control, Ear-fit type earphones*, Inner-ear type earphones, Rechargeable Ni-MH battery, AC adaptor, RCA lead, Optical digital cable, PC-Link cable, Conversion cable (4-pole to 3-pole), Carrying bag Optional accessories Rechargeable battery: AD-N55BT, Car adaptor: AD-CA55X, Cassette adaptor: AD-CT14, MD-to-MD edit cable: AD-M5AC, Tie-pin microphone: MC-TP2     • Design and specifications are current as of March 2003, but are subject to change without prior notice. • Audio-visual material may consist of copyrighted works which must not be recorded without the authority of the owner of the copyright. Please refer to relevant law in your country. * In some regions, ear-fit type headphones are not included with the MD-DR470H.