Nextar MA852s - Manual (Page 27)

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 Please disconnect the player from PC properly to avoid data loss.
 The transfer rate displayed on the PC may be different depending on the operating
system. Exact transfer rate should be subject to the player's indication.
 When the recorded voice file is too large, the response of the device may be slow.
21 Precautions
1). When not using the player for an extended period of time, remove the batteries to
avoid damage due to leakage. (Apply to Models that come with AAA or AA battery)
2). Do not use the player in extremely hot, cold, dusty or damp environments.
3). Make sure the HOLD key is in the unlock position before using the player (otherwise
controls will not function).
4). Avoid dropping or striking the unit .This may cause external and internal physical
damage to the player.
5). Replace battery with new one if: (Apply to Models that come with AAA or AA battery)
a) The battery level icon displays
(An empty battery)
b) The players powers off automatically and off again when restarted.