Compatible with Vertex VX-160 VX-180 VX-210 VX-231 VX-261 VX-264 VX-351 VX-354 VX-410 VX-420 VX-424 X-424 VX-450 VX-451 VX-454 VX-459 EVX-261 EVX-531 EVX-534 EVX-539, Yaesu FTA-250L FTA-450L FTA-550 AA FTA-550L FTA-750L FTA-850L etc. Two Wire Surveillance kit with Quick-Disconnect Acoustic Tube Super Reliable PTT Switch; Clear sound without distortion; Rugged Construction; Reinforced TPU cable. Excellent for use in noisy environments, such as police, nightclubs, bars, paintball, security, restaurants, hotels, bouncer, warehouses etc. Package includes: 1pc PTT mic + 1pc clear Acoustic Tube Pdflie 2 Way Radio Headset with PTT Mic, Earpiece for Motorola Yaesu Vertex standard VX-261 EVX-261 EVX-531 EVX-534 Walkie Talkies