This is for anyone who don't know about Miku Smartphone Limited Edition. This is the video I made another day https://www.youtube.com/watch?v=lraRnMSgt4I after the video, I tested out on the small little MP3 Player, it connects using NFC (Near field communication) you have to touch the MP3 player to Xperia, and it linked via bluetooth, your song will be play wireless, MP3 can be charged using Micro USB. I tested all the Docomo, none of them can really use except the little miku sheep that's walking around your screen, can use but, can't be further download/advance. I bought it the other day from Ebay and it as an unlocked phone, means sim is unlock, can be use any sim carrier, and the 4G LTE is available only at 1500 and 2100, I tried with 1800 and 2600 it can't, so it backward compatibility with 3G enchanced. And lastly is the Docking Charger, it does not provide a Micro USB AC adapter, I bought a 100/240 Voltage AC adapter and it works. Somebody ask me in facebook whether their region provide, I'm not sure but you can get it from ebay, make sure that fellow have good reputation and is using paypal, other than that = no .