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OTTO Engineering - Expect Excellence

FAQ'S

Select OTTO products are rated as Intrinsically Safe.  Please visit the Intrinsically Safe Accessories tab for a listing of available products.
A Return Materials Authorization (RMA) number is required for any returns.  Please contact our Customer Service Department, toll free at 888.234.6886 or email info@ottoexcellence.com to obtain an RMA number.  
Speaker mics generally use two sizes of jack for earphone kits.  One is 3.5mm (1/8") and the other is 2.5mm (3/32").  OTTO Manufactures earphone kits in both of these sizes with either a right-angle or straight plug to accommodate user preferences.

NRR is the Noise Reduction Rating for headsets and describes how much hearing protection a headset provides to the user.  The higher the NRR (measured in decibels), the more protection a headset provides.  For instance, a headset with a 24dB NRR reduces external noise by 24dB.  OTTO headsets are measured by an independent facility to assure accuracy of NRR ratings.  

OSHA requirements are based on noise exposure levels in the workplace, not on hearing protection performance.  For instance, if exposure guidelines are 85dB or below for a given environment, then a 24dB headset will provide adequate protection for up to 109dB of noise.  

OTTO product warranties vary depending upon the product purchased.  To determine whether your product is still within the warranty period, determine when it was manufactured using the date code stamped on the product then consult the following list to determine the length of coverage.  

OTTO date codes are four-digit numbers.  The first two digits indicate the year in which it was manufactured and the second two digits indicate the week.  For example, 1704 indicates the product was manufactured int he 4th week of 2017.  


Products Covered                           Length of Coverage
Misc. Replacement Parts, Ear Insert, Eartube, Earplug, Eartip, Elbows, Acoustic Tube,

Quick Disconnect Acoustic Tube Adapter, Earphone, Connector Cable, Cable Assemblies for Headsets 
and Remote Speaker Mics.

OTTO Adapters, Commercial Surveillance Kits, Listen Only, Skull and Throat Microphone Systems, 
Commercial Speaker Microphones, Commercial Lightweight Headsets.

OTTO Professional Surveillance Kits, Wireless Accessories, Professional Speaker Microphones, 
Professional Heavy Duty Headsets, Tactical Skull and Throat Microphone Systems, Tactical  Headsets.
No Warranty
24 Month Warranty
36 Month Warranty
Need to fix or replace your existing accessories?
We offer certain replacement parts for speaker mics, headsets, acoustic tubes, cables, and 
earphones.
For all your replacement parts, call OTTO Customer Service at 888-234-OTTO
WE CAN HELP!

 

Products Covered                           Length of Coverage
Misc. Replacement Parts, Ear Insert, Eartube, Earplug, Eartip, Elbows, Acoustic Tube,

Quick Disconnect Acoustic Tube Adapter, Earphone, Connector Cable, Cable Assemblies for Headsets 
and Remote Speaker Mics.

OTTO Adapters, Commercial Surveillance Kits, Listen Only, Skull and Throat Microphone Systems, 
Commercial Speaker Microphones, Commercial Lightweight Headsets.

OTTO Professional Surveillance Kits, Wireless Accessories, Professional Speaker Microphones, 
Professional Heavy Duty Headsets, Tactical Skull and Throat Microphone Systems, Tactical  Headsets.

No Warranty

24 Month Warranty

36 Month Warranty

Need to fix or replace your existing accessories?
We offer certain replacement parts for speaker mics, headsets, acoustic tubes, cables, and 
earphones.
For all your replacement parts, call OTTO Customer Service at 888-234-OTTO
WE CAN HELP!
 

 


 

Always start with your Customer Service Representative toll free at 888-234-OTTO(6886) or via email at info@ottoexcellence.com. If they are unable to assist you, they will direct you to an individual that will help address your question.
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Testimonials

OTTO Engineering, Inc. was founded in 1961 by Jack Roeser in the basement of his Park Ridge, IL home.

- OTTO - A great place to do business with.

"OTTO offers reliable order processing, timely shipping and quality products."

- John Parker

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