Large Active Noise Cancelling Remote Speaker Microphone (IMPRES) with Nexus plug

Active Noise Cancelling Technology. Front and Side PTT. Belt Clip : Rotating with Metal Ring. Audio Jack: 3.5mm and Nexus. Secondary Audio Accessories: PMLN7188 Voice Tube, RMN4052B Heavy Duty Headset, GMMN4585 HC-1 Single Speaker Headset and GMMN4584 HC-2 Dual Speaker Headset Emergency Button: Yes. Volume Control: Yes (Hi/Lo) Programmable Button: Yes Acoustic: Wind porting. Intelligent Audio: Yes. IP Rating: IP67. Intrinsic Safety Standard: No. Requires Radio Firmware version Mototrbo R2.7 or higher. Radio compatibility: Mototrbo DP4000e and Astro APX serie.