User Manual25When there are no valid signals available, consider the following:> Make sure that the GPS has a clear view of the sky.> Note that the GPS reception can be affected by:- Bad weather.- Dense overhead obstacles (e.g. trees and tall buildings).- Other wireless device in the car.- Reflective car window tint.5.2.5 Voice Too soft Or No VoiceIf earphones is in the earphone jack, the speaker will be cancelled, Remove the earphones fromthe unit. Check the Sound Set on your System, make sure your voice setting is correct and thevoice volume is set correctly.5.2.6 Why can not use my download files• The file format is not supported• The file is not in the correct Route• MP3 Route is as : SD card \media\mp3• MP4 Route is as SD card \media\mp4• JPG,BMP files Route is : SD card \media\pic• Map and navigation Voice is: SD Card \Cities\...5.3 Maintaining Your DeviceTaking good care of your device will ensure trouble-free operation and reduce the risk of damageto your device.> Keep your device away from excessive moisture and extreme temperatures.> Avoid exposing your device to direct sunlight or strong ultraviolet light for extended periods oftime.> Do not place anything on top of your device or drop objects on your device.> Do not drop your device or subject it to severe shock.> Do not subject your device to sudden and severe temperature changes. This could causemoisture condensation inside the device, which could damage your device. In the event ofmoisture condensation, allow the device to dry out completely before use.> Take care not to sit on the device. We advise not to carry the device in one’s back pocket forthat reason.> The screen surface can easily be scratched. Use the stylus or your fingers to tap on the screen.Avoid touching it with any sharp objects. Non-adhesive generic screen protectors designedspecifically for use on portable devices with LCD panels may be used to help protect the screenfrom minor scratches but may impede the sensitivity of the screen.> Never clean your device with it powered on. Use a soft, lint-free cloth moistened with water towipe the screen and the exterior of your device. The use of commercial house hold cleaners maydamage the screen and should not be used.> Do not use paper towels to clean the screen.> Never attempt to disassemble, repair or make any modifications to your device.Disassembly, modification or any attempt at repair could cause damage to your device and evenbodily injury or property damage and will void any warranty.Do not store or carry flammable liquids, gases or explosive materials in the same compartment asyour device, its parts or accessories.6. Battery, Charger and Safety Precaution6.1 About Charging> Use only the optional AC adapter and the DC Car Charger supplied with your device. Use ofanother type of AC adapter or Car Charger will result in malfunction and/or danger. Charging viathe USB cable is possible but due to the lower current of USB ports the charging process will takeconsiderably longer.> The AC adapter input rated 100~240V AC,50/60Hz, 0.35A, output rated +5V DC / 2.0 A,DC CarCharge input rated DC input 12V DC output 5V, 2A.> The Battery in not user replaceable.6.2 About the AC Adapter (Optional) and the Car Charger> Do not use the adapter or the car charger in a high moisture environment. Never touch theadapter when your hands or feet are wet.> Allow adequate ventilation around the adapter or the car charger when using it to operate thedevice or charge the battery. Do not cover the AC adapter or the car charger with paper or otherobjects that will reduce cooling. Do not use the AC adapter while it is inside a carrying case.> Connect the AC adapter to a proper power source. The voltage requirements are found on theproduct case and/or packaging.> Do not use an adapter or the car charger if the cord becomes damaged.