COMPATIBILITY - Baofeng/ Kenwood/ Retevis/ Arcshell walkie talkie radio etc.More models please refer to product description below WATERPROOF - IP56. Dust intrusion can be prevented(with no hurmful sediments). It can resist the water column of the high-pressure water spray gun for at least 3 minutes. HIGH QUALITY SOUND - Our speaker mic provides high quality audio with crisp, clear sound for your radio communications. 3.5MM AUDIO JACK - make it possible to use it in noisy environments,or if you don't want others to hear, you just need to attach a 3.5mm listen only earpeice. WIDELY USE - most popular in police and security personnel, and mostly used for patrol duty, large team activities, business activities and senior entertainment venues