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Coby mp3 players are very good for storing music. You can store up to 1000+ songs on the mp3.
User's last 6 passwords
A Coby MP3 player, depending on which one you purchase can cost as low as $20. A word of caution on Coby products, though. Unlike most companies, Coby only offers a 90 day warranty and many people have problems after the 90 days. Save up some money and buy a player with a better warranty.
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There are many places one can purchase a "Coby portable DVD player". It is recommended to purchase one at a legitimate online or brick and mortar store.
Depending upon personal preference a Coby MP3 player might be more attractive than an iPod Nano. They both share many of the same features but the Coby MP3 player is significantly cheaper and uses Windows Media.
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User's last 6 passwords
People use passwords, and for many reasons. Most people use passwords to protect their security. By the use of passwords you can restrict assess to something to people that know the password. This also allows you to keep some privacy.
There are many places online one can find a Coby MP3 player. It would be best to check Amazon or eBay. Other stores such as Staples or Office Max carry them as well.
As many as you have users with administrative privileges.
This depends on which model coby mp3 player you are looking at. Some have built in hard disks that are permanent. Some require SD cards in which case you can get a bigger or smaller sized card ranging from megabytes to gigabytes.