Pulse Larsen NMOWB150BCO VHF 135-174 Mhz Wideband 1/2 λ Base Coil Only, Whip Sold Separately Motorola APX 6000XE Receive-Only Earpiece Earbud Design: 5/8 over 1/4 λ

Design: 5/8 over 1/4 λ

and has been replaced with the 3M Peltor CH-3 Headset

or dust may be present

IP Rating: IP67 weatherproof

The microphone is designed to only pick up speech

Pulse Larsen NMOWB150BCO VHF 135-174 Mhz Wideband 1/2 λ Base Coil Only, Whip Sold Separately Motorola APX 6000XE Receive-Only Earpiece Earbud Design: 5/8 over 1/4 λLarsen Pulse NMOWB150BCO VHF 135 174 Mhz Wideband 1 2 Base Coil Only, Whip Sold Separately* Type: Wideband 1 2 Frequency: 135 174 Mhz Gain: N A Max Height: 2. 75 Inches Power Rating: 100 Whip Color: Coil Only Cable Assembly Mount: Order Separately* *The most commonly used cable assembly mount is the NMOKHFUD (27 MHz to 6 GHz) with 17 of UD (RG 58 U Dual Shield).