▁to ▁a ▁computer ▁or ▁another ▁USB ▁host ▁( the ▁player ▁requires ▁changing ▁the ▁active ▁setting ▁from ▁' file ▁transfer ' ▁to ▁' player ') ▁ ▁Memory ▁capac ities ▁between ▁ 6 4 ▁MB ▁and ▁ 3 2 ▁GB . ▁Some ▁higher ▁capacity ▁versions ▁may ▁have ▁a ▁smaller ▁flash ▁memory ▁chip ▁with ▁an ▁edited ▁F AT ▁master ▁table ▁or ▁modified ▁hardware ▁to ▁appear ▁higher ▁in ▁capacity ▁than ▁it ▁really ▁is ▁by ▁writing ▁over ▁previous ▁se ctors . ▁ ▁Ar ound ▁ 8 ▁hours ▁of ▁battery ▁life ▁on ▁models ▁using ▁a ▁A AA ▁battery ▁( Al kal ine ▁or ▁Ni M H ). ▁O thers ▁have ▁a ▁re charge able ▁battery ▁which ▁charges ▁via ▁USB ▁host ▁connection . ▁Many ▁turn ▁off ▁automatically ▁when ▁idle ▁for ▁even ▁ 3 0 ▁seconds . ▁Char ge ▁duration ▁var ies ▁widely ▁between ▁play back ▁and ▁recording ▁modes . ▁ ▁Common ▁specific ations ▁The ▁below ▁information ▁var ies ▁by ▁ch ips et ▁version ▁and ▁manufact urer . ▁▁ 2 4 - bit ▁D SP ▁with ▁on - ch ip ▁D SU ▁▁ 8 - bit ▁Z 8 0 ▁CPU ▁core ▁with ▁on - ch ip ▁D SU ▁( run s ▁at ▁ 2 4 . 5 7 6   M Hz ▁( TY P ), ▁up ▁to ▁ 6 0   M Hz ▁— ▁software - control led ) ▁ ▁USB ▁ 2 . 0 ▁Full ▁speed ▁( not ▁Hi - Speed ), ▁with ▁transfer ▁rates ▁up ▁to ▁ 8 ▁M bit / s , ▁or ▁ 1 ▁MB /