1.Use SAW DEVICE aeronautical communications device to ensure stability of signal transmission.

2.voice prompt operation steps

3.12 music 

4. Built-in anti-channel mixingfunction.

5.it can be equippped with data interface and fast ring software to Storage call information .Achieve information collection. Service assessment efficiency supervision.

6.Flexible ding could be changed at will

7. All the text on the button could be changedfor different application.