500m distance professional silent disco 50 folding headphones 2 transmitters - rf wireless for ipod mp3 dj music

1.wireless portable headset for compact storage.widely used for silent party, meeting, education, broadcasting, tourism,yoga and so on 2.compatible with transmitters that have a range of up to 150 meters making them great for large events. 3.phase-lock loop technology prevents signal loss over longer distances or in unusual environments; advanced 40mm speakers provide a well-balanced, high definition sound. 4.playing up to 2 different audio streams,allow your guests to choose which tunes they love the most 5.several headphones can work with 1 transmitter simutaneouly;big-size luxurious and superior comfortable ear pads, isolating against noise with a tight seal that improves sound quality.syi