KOSS Manuals & User Guides

User manuals, setup guides, troubleshooting help, and repair information for KOSS products.

Tip: include the full model number printed on your KOSS label for the best match.

KOSS manuals

Latest posts, featured manuals, and retailer-linked manuals for this brand tag.

KOSS UTILITY UBTA Utility Bluetooth Adapter User Guide

October 21, 2025

KOSS UTILITY UBTA Utility Bluetooth Adapter Specifications Koss Corporation Model: KOSS BT115i V2, KOSS BT221i V2, KOSS BT232i V2, KOSS KSC35 Wireless V2, KOSS UTILITY UBTA Input: 5V ,80mA or powered by (3.7V, 100mAh) Li-Ion Polymer Battery Printed in China…

Brand: KOSS

KOSS KPH30 Wireless Headphones User Guide

July 28, 2025

KPH30 Wireless Headphones USER GUIDE FRONT BACK KPH30 Wireless Headphones + x1 x1 1 + >8s ... 3 KOSS KPH30 Wireless >1s + x1 >1s + >4s >4s + x1 x2 + x2 LEGAL FRONT KPH30 Wireless Headphones Koss Corporation…

Brand: KOSS

KOSS UTILITYBTA Bluetooth Adapter User Guide

July 24, 2025

USER GUIDE LEGAL Utility BT Adapter Koss Corporation hereby declares that this wireless device, Bluetooth Headset, Model: KOSS UTILITY BTA is in compliance with the essential requirements and other relevant provisions of directive 2014/53/EU. A copy…

Brand: KOSS

Koss PORTAPRO2P0 Bluetooth Headset Owner’s Manual

March 1, 2025

Koss PORTAPRO2P0 Bluetooth Headset Important Safety Information General Warnings Read all safety information before using the product. Keep the product away from water and moisture to prevent electric shock. Do not disassemble the product; it contains no user-serviceable parts. Use…

Brand: KOSS

KOSS L76-PORTAPRO2P0 Porta Pro On Ear Headphones Instructions

March 1, 2025

KOSS L76-PORTAPRO2P0 Porta Pro On Ear Headphones Introduction Thank you for purchasing Koss headphones. Please read these instructions carefully before using the product. This document contains important safety, handling, and warranty information. Safety Information Warning: Listening at high volume levels for…

Brand: KOSS

KOSS Porta Pro Wireless On Ear Headphones User Guide

September 17, 2024

KOSS Porta Pro Wireless On Ear Headphones User Guide Product Instruction FRONT BACK

Brand: KOSS

KOSS CKARA2432CCT-TS Kara LED Medicine Cabinet Installation Guide

December 4, 2023

KOSS CKARA2432CCT-TS Kara LED Medicine Cabinet Product Information The Suite Mirror Cabinet KARA is a high-quality cabinet designed for installation in Zones 2 and 3. It is not suitable for installation in Zone 1. The cabinet comes with a handle…

Brand: KOSS

koss QZ-99 Noise Reduction Headphones User Manual

November 23, 2023

koss QZ-99 Noise Reduction Headphones DESCRIPTION The KOSS QZ99 Passive Noise-Reducing Over-Ear Headphones are skillfully crafted to create an immersive listening experience by minimizing external distractions. Engineered with Pneumalite™ ear cushions and a secure headband, these headphones provide passive sound…

Brand: KOSS

KOSS CDP2581 Personal CD Player Owner’s Manual

November 8, 2022

CDP2581 Personal CD Player

Brand: KOSS

Koss KPH30i On-Ear Headphones User Manuals

November 2, 2022

Koss KPH30i On-Ear Headphones SPECIFICATION Brand Koss Model Name KPH30i Color Dark Grey Form Factor On Ear Connectivity Technology Wired Product Dimensions 6 x 2.5 x 7.2 inches Item Weight7 ounces Microphone In-Line Microphone. Portability & Travel Rugged design for…

Brand: KOSS

Koss BT539i Bluetooth Headset User Manual

manual • August 2, 2026

User manual and quick start guide for the Koss BT539i Bluetooth Headset, including pairing instructions, charging, controls, and safety information.

Brand: Koss

Koss EQP1/EQP2 Portable Amplifier with Sportclip Stereophones - User Guide & Warranty

User Guide • April 8, 2026

Detailed information on the Koss EQP1 and EQP2 portable amplifier, including features, setup instructions, warranty details, and safety information. Enhance your audio experience with built-in EQ and Sportclip stereophones.

Brand: Koss

KOSS KPH30 Wireless Headphones User Guide

April 8, 2026

User guide for the KOSS KPH30 Wireless Headphones, covering setup, operation, safety information, specifications, and warranty.

Brand: Koss

Koss BT221i Bluetooth Wireless Headphones User Manual and Specifications

User Manual • April 8, 2026

User manual and technical specifications for the Koss BT221i Bluetooth wireless headphones, detailing pairing, controls, charging, safety guidelines, and compliance information.

Brand: Koss

Koss ESP/950 Electrostatic Stereophone System User Manual and Specifications

manual • April 8, 2026

Comprehensive user manual for the Koss ESP/950 Electrostatic Stereophone System, including setup instructions, troubleshooting guide, and detailed specifications for the stereophone and E/90 Energizer/Amplifier.

Brand: Koss

Koss KPH7 Wireless Bluetooth Headphones User Manual and Guide

Instruction Manual • April 8, 2026

Comprehensive user manual for the Koss KPH7 Wireless Bluetooth on-ear headphones. Find detailed instructions on pairing, controls, charging, safety precautions, technical specifications, and warranty information.

Brand: Koss

Koss Product Warranty and Repair Information

Warranty Guide • April 8, 2026

Comprehensive guide to Koss product warranty, repair procedures, contact information, and terms for the United States and Canada, detailing different warranty types and claim processes.

Brand: Koss

Koss BT330i Wireless Headphones User Manual and Guide

User Manual • April 8, 2026

Comprehensive guide for Koss BT330i Wireless Headphones, covering setup, music and call controls, charging, pairing, safety, and FCC compliance.

Brand: KOSS

Koss Porta Pro Wireless Bluetooth Headphones User Manual and Specifications

User Manual • April 8, 2026

Detailed user manual and specifications for the Koss Porta Pro Wireless Bluetooth headphones, covering setup, controls, charging, status indicators, safety warnings, compliance, and technical details.

Brand: Koss

KOSS CS340BT QZ Communication Headset User Manual and Specifications

User Manual • April 8, 2026

Comprehensive user manual and specifications for the KOSS CS340BT QZ Bluetooth Communication Headset, covering pairing, controls, charging, product details, and safety warnings.

Brand: KOSS

Koss Plug Wireless Bluetooth Headset: User Guide and Specifications

manual • April 8, 2026

Comprehensive guide for Koss Plug Wireless Bluetooth headphones, covering setup, controls, charging, safety, and technical specifications. Learn how to pair, use features, and maintain your device.

Brand: KOSS

Koss Warranty and Repair Guide for Headphones

Warranty Guide • April 8, 2026

Detailed information on Koss warranty services, repair procedures for the US and Canada, and an overview of limited lifetime, 90-day, and one-year warranties for Koss audio products like headphones and stereophones.

Brand: Koss

Koss KSC21 Headphones User Manual

KSC21 • July 6, 2026 • Amazon

User manual for Koss KSC21 On-Ear Headphones, providing setup, operation, maintenance, and troubleshooting information.

Brand: Koss

Koss CDP 404CPS Portable CD Player User Manual

CDP 404CPS • June 18, 2026 • Amazon

Comprehensive user manual for the Koss CDP 404CPS Portable CD Player, covering setup, operation, maintenance, and troubleshooting.

Brand: Koss

Koss CS200 USB Communication Headset User Manual

CS200 USB Communication Headset (Model 194390) • May 3, 2026 • Amazon

Comprehensive instruction manual for the Koss CS200 USB Double-Sided On-Ear Communication Headset. This guide provides detailed information on product features, setup, operation, maintenance, troubleshooting, and technical specifications to ensure optimal performance and user experience.

Brand: Koss

Koss CS100 Speech Recognition Computer Headset User Manual

CS100 • April 14, 2026 • Amazon

This manual provides detailed instructions for the Koss CS100 Speech Recognition Computer Headset. Learn about its features, setup, operation, maintenance, and troubleshooting for optimal performance in speech recognition, gaming, and communication.

Brand: Koss

Koss KPH7 Wireless Bluetooth On-Ear Headphones User Manual

196213 • April 3, 2026 • Amazon

Comprehensive instruction manual for the Koss KPH7 Wireless Bluetooth On-Ear Headphones, covering setup, operation, maintenance, and troubleshooting.

Brand: Koss

Koss UR40 Collapsible Over-Ear Headphones User Manual

UR40 • April 2, 2026 • Amazon

This manual provides instructions for the setup, operation, maintenance, and troubleshooting of the Koss UR40 Collapsible Over-Ear Headphones. It also includes detailed product specifications.

Brand: Koss

Koss KPH7-10 On-Ear Portable Stereo Headphones User Manual

KPH7-10 • March 26, 2026 • Amazon

Comprehensive user manual for the Koss KPH7-10 On-Ear Portable Stereo Headphones, covering setup, operation, maintenance, troubleshooting, and technical specifications.

Brand: Koss

Koss KPH7B Portable On-Ear Headphones User Manual

KPH7 • March 22, 2026 • Amazon

Comprehensive user manual for the Koss KPH7B Portable On-Ear Headphones, covering setup, operation, maintenance, troubleshooting, and specifications for optimal audio experience.

Brand: Koss

Koss 'The Plug' In-Ear Headphones User Manual

The Plug • March 22, 2026 • Amazon

Official user manual for Koss 'The Plug' In-Ear Headphones, model B00001P4XA. This guide covers setup, operation, maintenance, troubleshooting, and product specifications.

Brand: Koss

Koss The Plug Wireless Bluetooth In-Ear Headphones User Manual (Model 196982.102)

196982.102 • March 20, 2026 • Amazon

Comprehensive user manual for Koss The Plug Wireless Bluetooth In-Ear Headphones, Model 196982.102. Includes setup, operation, maintenance, troubleshooting, and specifications for these noise-isolating, sweat-resistant earbuds with in-line controls.

Brand: Koss

Koss HG857 Portable CD System User Manual

HG857 • March 16, 2026 • Amazon

Comprehensive instruction manual for the Koss HG857 Portable CD System, covering setup, operation, maintenance, troubleshooting, and technical specifications.

Brand: Koss

Koss Porta Pro Wireless 2.0 On-Ear Headphones User Manual

Porta Pro Wireless 2.0 • March 10, 2026 • Amazon

User manual for the Koss Porta Pro Wireless 2.0 On-Ear Headphones. Includes setup, operating instructions, maintenance, troubleshooting, and specifications for this Bluetooth retro-style headphone with 20+ hour battery life, USB-C charging, microphone, and analog audio pass-through.

Brand: Koss