Charging with Wall Charger

SanDisk Guru:

I have a Samsung cell charger with a ‘general’ usb socket for a standard American wall-electrical outlet. Can I charge my Sansa Clip Zip (4gb) with this charger via the usb charger that came in my S. Zip Clip packaging? I am not sure what voltage the Samsung plug is, the type is too small to even read. I don’t want to fry my Zip Clip so need to know what voltage is too high or too low? &/or what is the right voltage amount for an electrical outlet charger for my S. Zip Clip?  It is not always convienient for me to charge this device on my computer (I’d rather not most days).

Thank you!