>>358436530
You don't need the official one, just make sure it's at least 3.0 and get one where the headset side plug is at a right angle like the official one and looks more 'solid' you don't want it moving around since it's easy to disconnect.
If you use WiFi know that the battery won't last long, you can buy a battery to stick on it to make it last much longer but that's also extra cost.