Operation Manual
HOLUX GPSPort 255 
Safety Precautions 
•  Use the power adapter included with the package, using power 
adapters other than the one provided will result in malfunction and 
could prove dangerous. 
•  Battery replacement should not be performed by consumers, only 
professionally trained maintenance personnel should do the 
removal of the cover and the internal components. Note: It may 
cause explosion if the battery is not properly replaced with the 
same or equivalent model. 
•  About the power adapter: 
1.  Do not use the power adapter in a wet environment. When 
hands and feet are wet, do not touch the power adapter. 
2.  While using the power adaptor, ensure that the area is well 
ventilated. Do not let paper or other material cover the power 
adaptor, as this will interfere with cooling. Do not use the power 
adaptor whilst it is in a bag. 
3.  Do not attempt to repair the device. If device is damaged or is 
in a wet environment, replace the device immediately. 
4.  It is not recommended to charge from a PC because the PC 
power voltage is not enough to supply the device. 










