You can use for nightclubs, bars, security,restaurants, hotels, manufacturing plants, concerts,warehouses, and noisy environments. DGR Series: DGP4150, DGP4150+,DGP6150, DGP6150+DGP5000 / DGP5000e Series: DGP5050, DGP5050e, DGP5550, DGP5550eDGP8000 / DGP8000e Series: DGP8050, DGP8050e, DGP8050EX, DGP8550, DGP8550e, DGP8550EXXiR P8200, XiR P8208, XiR P8268, XiR P8600, XiR P8608, XiR P8620, XiR P8628, XiR P8660, XiR P8600i, XiR P8608i, XiR P8620i, XiR P8660i, XiR P8600EX, XiR P8608 EX, XiR P8668EXTETRA Terminal: MTP830S, MTP850S, MTP6550, MTP6750, ATEX MTP8500EX, ATEX MTP8550EX Easy to Use Hidden microphone inside PTT (Push To Talk) switch, compact and neat designStrong 360 degree rotatable clothing clips allow you to talk without holding the microphone Clear and Private Communication The acoustic tube connecting the ear bud will make the sound spread crystal clear and reduce electronic radiation, even if you are walking in a noisy crowd. 360 Degree Rotatable Clip Walkie talkie earpiece with microphone which is hidden inside PTT switch, provide you a clear call.Hands free.The clip on the PTT can be clipped anywhere on your clothes. Ideal for FBI ,security, hiking, hunting,police, military, bars, restaurants, cinema, surpermarket and all kinds of noisy places.