GoodQbuy 2-Pin Acoustic Tube Earpiece & Headset Heavy Duty Headset with Large PTT Microphone with Motorola Radio Devices GP300 RMU2040 DTR550 CLS1110 CLS1410 Durable and thick cable, designed for tough environment This headset is for the Motorola radios and many more that require standard 2 Pin Excellent for use in police, military, nightclubs, bars, paintball, security,restaurants, hotels, bouncer, warehouses, and noisy environments.