1.Support 4 people connection and talk at the same time, the talk distance can reach 1000 meters;

2.Fx4 Pro owned Qualcomm CSR Bluetooth 5.0 CSR chip, it will make the connection more faster, more stable, and more compatible between the intercoms;

3.40mm "high-power" " stereo" "high-definition" sound quality headphones, HIFI stereo sound quality;

4.Built-in independent high-definition FM radio chip, You can switch between European and Japanese frequency bands:
Japanese frequency band:76-91Mhz
International frenquency band:86-108Mhz;

5.The professional CVC chip built-in noise reduction technology and equipped with a professional noise reduction microphone to make the call sound quality clearer；

6.850 mAh battery, longer battery life;

7.Power reminder: There are three levels of power reminder: full power, medium power, low power;

8.Self-check power: double-click the multi-function button in standby mode, there will be power prompt;

9.Large silicone button with light, easy to operate during the riding;

10.Phone function:Redial the call (last number redial); automatic/manual answering of the call, rejecting the call, hanging up the call, voice dialing;

11.3.5mm Headphone jack, universal unilateral ear-hook special earphone for referee; (Pakcage not included).

12.Two kinds of installation methods (clip installation/3M glue stick Velcro);

Q: Why are my two speakers or one side speaker unavailable/no sound?

A: 1. Please check if the headphone cable is inserted in the correct direction, 2. Please make sure the eraphone is fully inserted into the interface.

Q: Why is my microphone unavailable/no sound?

A：1. The microphone part is detachable and can replace the soft/boom microphone, so please check if this part is inserted tightly.

Q: Why is the volume of the intercom really low?

A: Please note that both the volume of the intercom or the volume of listening to music can be adjusted with the''+" and "-" button, if you think the intercom volume is too low, you can press the ''+" to increase the intercom volume.

Q: My friend and I both use FX4, why can I hear his voice, but he can’t hear me?

A: 1. It may be that his speaker is defective. Please ask him to connect the phone and play music to check if it is the speaker problem. 2. It may also be that your microphone is defective and he cannot hear your voice. Please replace the soft/hard microphone to check if it is the microphone problem.