... picture up to 500pcs -FCC,RoHS,CE -Deskstop design Remote control for digital and full-duplex Widely used in villa ,house ... 1) Transmission distance: 300m (free lane)2).World Public Frequency 2.4G data Voice, image transmission3).Full-duplex hands-free ... 6).CE, ROHS , FCC passed7).83 effective communication channels,Frequency-hopping technology, super error-correcting capability,So the conversation is ...