To Make Your Razer tiamat 7.1 Portable you need: Belkin Rockstar 5 way headphone splitter. You need a 5 way headphone splitter for the adapter to connect all 4 3.5 mm headphone jack except for the Microphone jack. so that way, you can use your Razer tiamat on your phone, tablet, mp3 player and other. Portable USB phone charger. You need a phone charger so that way your headphones need power make it work. Plug your razer tiamat 7.1 USB to your portable charger and it will work. Make sure it is charged. Without the portable charger, it will not hear a sound and it is completely silence.