XVIVE U5T transmitter for the Xvive U5 wireless system. The U5 Wireless Audio for Video System is a versatile audio solution for video production and other speech-recording applications. It can be used to send audio wirelessly from the included LV1 lavalier microphone (via the systemÕs beltpack Transmitter) to the Receiver, which can be connected to a DSLR/video camera or audio device.