Motorola IMPRES Remote Speaker Mic PMMN4062AL - Noise Cancelling, IP54, for APX/SRX RadiosMotorola remote speaker microphone with clip is easy to operate even while wearing gloves and features IMPRES audio, which optimizes your audio when operating in noisy environments. The noise canceling acoustics negate background noise so your voice come through loud and clear when you speak directly into the microphone. Also has a programmable orange emergency button and audio jack to attach earpieces for discreet communications. Compatible with APX