Built-in 4400mAh battery could recharge your mobile phone when you are riding.<br>Double LED lights, could use as front light and flash light.<br>Bluetooth music player &amp; hands free.<br>Electronic Horn<br>Can play music from microSD card up to 32GB, support MP3,WMA,WMV.<br>Support AUX audio input.<br>IP54 water-proof and dust-proof.<br>32-bit-processor control system.<br>High quality speaker, nice and clear sound quality.<br>Suitable for leisure sport.<br><span style="font-size: 14pt;">2 Available colors: <span style="color: #00ff00;">Green</span> or <span style="color: #ff6600;">Orange</span> color!!!<br></span><span style="font-size: 18pt; color: #ff0000;">Product launch special: Free 4GB USB thumbdrive while stock last!!!</span>