RMN4057 - HT Series Listen Only Hard Hat Attached Headset with 3.5 threaded connector
Motorola RMN4057, RMN4057B Receive-only Dual Muff Headset for use with Hardhats
New HT Series listen-only over-the-head style headset has a threaded 3.5mm connector
Ideal for high-noise noise environments. Provides 25 dB NRR.
Compatible with any remote speaker microphone with 3.5mm threaded connector. Certified for use with (INC) – NNTN8383 Industrial Noise-Cancelling Remote Speaker-Mic
Manufactured by 3M Peltor (HTM79P3E-42) for Motorola
12 month warranty by Motorola