How to use the walkie-talkie headset:1. First of all, understand the model of the intercom that you are using & the related headphone connector (the headphone of various walkie-talkies is not the same).2. Turn on the walkie-talkie & adjust the channels that the intercom can use to talk to each other.3. Turn off the walkie-talkie before inserting the earphone, & insert the earphone into the corresponding jack of the interphone (Note: The insertion must pay attention to the earphone plug in place), & start the adjustment.4. Press the call button to call & check whether the other partys radio can accept the call. If the headset cannot be used incorrectly, replace the headset & repeat the above actions until the headset is fully available for calls & calls.5. Adjust the headphone clothes clip or collar clip, adjust the left or right ear for your own use, & wear the headset (Note: Do not wear headphones when handling large machinery that can inhale or wreck havoc.)6. The perfect distance between walkie-talkie headset is 2-8 centimeters from mouth to call button distance.7. Different headsets have different functions. Please select an appropriate walkie-talkie headset according to the surrounding environment used by the intercom. Headphone use precautions: (1) The exterior of the earphone is mainly composed of plastic parts & wire rods. In use, the plastic parts must not be vigorously twisted & the wire must be strongly pulled. (2) The normal communication & laun