The Sheepdog Quick Disconnect 1-Wire Push-to-Talk (PTT) with 3.5mm earpiece jack is built with durable cabling, high-quality microphone and durable polycarbonate housing. Designed to withstand harsh environments. The full-size PTT is easy to find and operate. The PTT/mic cord is designed to be mounted to the front of a vest/carrier. Ideal for Police, Fire, EMT, elite security, executive protection and military. Includes Quick Disconnect Adapter with PTT Button for Motorola APX Series radios, and two retainer clips, metal and plastic. Compatible with Motorola APX, APX1000, APX2000, APX3000, APX4000, APX4000XH, APX5000, APX6000, APX6000LI, APX6000XE, APX7000, APX7000XE, APX8000, APX8000H, APX8000HSRX, APX8000HXE, APX8000XE, APX900, SRX2200, XPR6000, XPR6100, XPR6300, XPR6350, XPR6380, XPR6500, XPR6550, XPR6580, XPR7000, XPR7000E, XPR7300, XPR7350, XPR7350E, XPR7380, XPR7380E, XPR7500, XPR7550, XPR7550E, XPR7580, and XPR7580E radios.