| MP4 watches comes with different features besides its basic functions such as movie/video playing, digital clock with calendar, and USB flash drive. Some of them may be critical for your purpose. In general, they can all be used as USB flash drive. Most of them comes with a built-in digital voice recorder. Some may prefer mp4 watches with FM radio. A really cool feature of several models is the built-in FM Transmitter, which allows you Broadcasting your music to any FM Radio such as your Car Audio system, so you can share music with any friends and you do not need a CD player for your car anymore. Since Bluetooth headsets are very popular today with cell phones, some mp3 watch models has built-in Bluetooth capability, allowing you listen to music with your cell phone Bluetooth headsets. Did I mention that we now have Mobile cell phone watches which have MP3/MP4 Player built-in and comes with LCD display? Finally, if you like me who hates earphones, here are the MP4 watch with built-in Speaker! Another major decision of buying MP4 watches is how big memory size one should choose. This really depends on how much computer data and songs you want to carry with you. A survey shows that a 2GB memory size should satisfy 95% people. 2GB memory size is the good balance of price and memory capacity. You can click below to select the different memory sizes by referring to the following estimate of how many songs or playing time for different memory sizes.     | Memory Capacity | Number of songs* | Hours of play* | | 128 MB | 60 | 4 hours | | 256 MB | 100 | 8 hours | | 512 MB | 250 | 16 hours | | 1 GB | 500 | 32 hours | | 2 GB | 1000 | 64 hours | | 4 GB | 2000 | 128 hours | | 8 GB | 4000 | 256 hours | * Approximate figures based on CD-quality WMA (64 Kbps) |
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