The Kube2 is positioned as the world's smallest mp3 player. Produced by Bluetree electronics, it has a battery life of 6 hours and a memory capacity between 512 MB to 32 GB. To change the song, simply swipe your thumb across the main face, or to change the volume, press down lightly at the top of the device to increase, or at the bottom to decrease. You can also purchase removable stickers to customise your Kube2. It's also marked as a very cost effective mp3, with the 4GB version retailing at a mere $35 USD in Singapore.