Two way communication; the transmitter has two modes; one-way explanation and two-way intercom; two-way communication; and supports the receiver to speak.
Long communication distance; the tour guide system has the ability to transmit and receive signals over a 280m/919ft distance outdoors;
Built-in 2500mA lithium battery; transmitter can use for 10 hours after full charged; and receiver could continue work for 10-70 hours after full charged;
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