Secure Tacitc 94 ( ST94 ) Series PTT are based on the well known Nexus M9177/5-2 ‘ U94 ‘ and reliable , trusted SKYEYE Tactical PTT.Contain the following changes :1. Replaced Standard Nexus ‘clicker’ Switch by High Round circular switch ( Prevent Mistouch , Impact Resistance, IP67 , Wide Operate Range -55 C to +125 C ) 2. Installed Rubber Cover on Headset Socket to increase Connection Sealing between the Headset and... PTT 3. Replaced Nexus Clip / US Molle Clip by the Custom Made Clip.MOLLE Compatible , Extra hole for sling / Hook attach. 4. Replaced Standard Slot Screw by the Security Torx Screws Set. Ram-Out Resistance. All ST94 Series PTT are 1 year Limited Warranty ( Start from Date of Purchase ) , Warranty cover manufacturing defect on internal electronic Parts , Cables and Switch only.Not listed parts are not in the warranty coverage.Other defect / damaged , you may contact us for further info , we might repair your unit for extra cost.Disassemble PTT unit will void any warranty also we will not follow/ repair it. Secure Tacitc 94 (ST94 ) Series , Regular Coiled Cable Version are design for Electret Microphone , NATO Wiring Nexus TP-120 / U93 or other variant Connector Headset. For Reference Only : Specific Bone Conduction Headset / Bowman Headset Models. For Technical Details please check Headset Specification sheet.Use with dynamic Microphone Headset may have output signal ( Voice ) low issues! Designed For Radio use with Motorola 2 Pin Type .