You need to do some homework before buying the modulator. Here are some tips to help:
1. Select the model which allows you to set the desired FM channel. There are models with 6-8 pre-fixed FM channel for use. But as you may noticed for Malaysia, most of the FM channel are occupied by radio stations so there are a great chance where the pre-fixed channels might run out of service. It is best to get the one which allows you choose the FM channel without limitation (although there are still chances you might face interference with the car next to you which using a modulator as well).
2. Opt for the one which not only plays MP3 file but Wave as well.
3. Get the modulator which can attach not only thumb drive but SD/MMC card as well. However I've never tried to put 2 storage medium at the same time to see if it will work. Check the pic below for detail:
You may noticed there are 2 input holes which meant for SD/MMC card & thumb drive
4. Be sure you know the limit of the modulator. For usual models, the max storage device it can recognize is 4GB. This means you can't plug a 8GB thumb drive and screaming "Why it can't play the song?"
5. Do not alter the angle of the modulator too often. Most of the models allow user to adjust the unit angle for better display, however it is not advisable to change it too often as this may spoiled the internal cable connection.
6. Check the fuse condition if the modulator failed. You can open the case usually by twisting it in anti-clock direction to release the cap on top. You may notice there is a fuse embedded inside where you can easily pour out (make sure you catch it before it reach the floor). Check the pic below:
Check the fuse to ensure it is still ok (the fine copper line in the fuse is still attached & not broken)
7. Do not switch the volume in the modulator to the max. The sound quality projected in max usually is distorted (disturbance scratching voice). Best is to set it to medium level.
Last but not least, make sure you unplug the modulator & keep it in safe place before you turn off your car engine and leave your car everytime. Enjoy!
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