1. Only use HYT original antenna or recognition. Unauthorized antennas, modified or added attachment it might damage the interphone antenna or in violation of the provisions of the radio administration bureau, the ministry of information industry;
2. When use, don't use your hands to the antenna;
3. The walkie-talkie antenna can't back off, otherwise easy to burn out the power tube when launch;
4. Do not use the damaged antenna. At launch, if damaged antenna skin contact, may cause mild burns, please.