Motorola PMMN4071A Impres Remote Speaker Microphone with Noise-Cancelling Directional (Black) IMPRES microphone conveniently clips to your shirt pocket or lapel and enables easy communication without having to remove the radio from your belt Features a noise-cancelling directional microphone that helps eliminate ambient noise and ease communications in high-noise environments A large housing makes it easier to operate while wearing gloves in a more rugged environment Motorola's exclusive IMPRES technology improves voice intelligibility and amplifies loudness-even in noisy situations Compatible, XPR 3300, XPR 3500