Easy to Use and Highly FlexibleLightweight and Portable device, suitable for outdoor or indoor uses

No Onsite Technician NeededReceiver working time up to 16 hours and Transmitter working time up to 10 hours。The speaker can speak by transmitter , the visitor can listen can receiver.  It providing high-quality tour services, it overcomes the noise pollution and confusion caused by the previous use of loudspeakers and visits a clear, quiet and comfortable environment.