Live wireless monitoring The U4 has a portable volume, and both the A:receiver are miniature Using a mini-size launcher, you can create your listening system with more flexibility. Whether you connect to a mixer, multimedia speaker, a portable speaker. Sound cards and other equipment are more convenient. With 6 channels,6 monitoring systems can be used at the same time, Silent rehearsal wireless monitoring. When you need Band rehearsal, but you can't use a . You can use mixers and wireless in ear monitoring systems to build silent rehearsals Portable in ear wireless monitoring system Color: As Shown Material: Plastic Specification:A:Receiver Package Contents: 1 x Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.