OTTO Engineering Inc.

Durable design and construction to meet MIL-STD-810 specs Fully sealed to meet harsh conditions like 40 mph blowing rain Heavy-duty cable assembly with strain relief for demanding applications Two-position volume control for operation in various noise environments 2.5mm earphone jack for optional earphone accessories Clothing spring clip which can be positioned 360 degrees Opitional emergency button and antenna connector models Modular internal design to facilitate field repair

Remote push-to-talk (PTT) options let you remotely key your radio Remote PTT's give you the advantage of hands-free mobility for handling weapons or tools Comfortable and covert, can be wired under clothing Users can key their radios with the light touch of a finger 5' straight cable with 2.5mm right angle connector

Behind-the-head style headset with dual ear inserts Performance of a heavy-duty headset without all of the weight and bulk Provides noise reduction with use of NoisEz Ear Tips (29dB) Multiple ear insert options included Ear tips are non-toxic, non allergenic Easily converts from high noise to low noise environment Flexible extreme noise-canceling boom microphone with replaceable windscreen Can be worn under helmet or cap Optional PTT Pigtail available for some radio models

• Model Number5100

This adapter is required to use with some EF JOHNSON 3.5mm threaded plug (MA) OTTO accessories . To ensure proper connectivity

Behind-the-head style with single left earphone Designed for extended wear in active environments Ultra Lightweight frame for superior comfort and fit Flexible, electret boom microphone with replaceable windscreen Can be worn under helmet or cap Optional PTT Pigtail available for some radio models

Immersion rated with earphone jack seal closed, fully sealed per IP68 standard: tested to withstand submersion in 1 meter water for 31 minutes Larger push-to-talk (PTT) with positive tactile feedback Samarium cobalt high output speaker for improved voice intelligibility Push-button volume control 2.5mm or 3.5mm earphone jack isolated from main housing for seal integrity Contoured design for easy handling Field-replaceable belt clip