MONSTER AC311

Monster Open Ear AC311 OWS Bluetooth 5.4 Headphones

Model: AC311 | Brand: MONSTER

Introduction

Welcome to the instruction manual for your new Monster Open Ear AC311 OWS Bluetooth 5.4 Headphones. These open-ear wireless headsets are designed for comfort and performance, featuring IPX5 waterproofing, AI noise cancelling for calls, and a secure ear hook design, making them ideal for sports and daily use. This manual provides essential information on setup, operation, maintenance, and troubleshooting to ensure you get the best experience from your device.

Monster Open Ear AC311 Headphones with Charging Case

Monster Open Ear AC311 Headphones with Charging Case

Package Contents

Please check the package for the following items:

  • Earphone (L & R) x 2
  • Charging Case x 1
  • Package Box x 1
  • Type-C Charging Cable x 1
  • User Manual x 1
  • Warranty Card x 1
  • Certificate Of Conformity x 1
Package Contents of Monster AC311 Headphones

Visual representation of the Monster AC311 package contents

Specifications

BrandMonster
ModelOpen Ear AC311
Bluetooth Version5.4
Speaker SpecificationΦ16.2mm
Audio DecodingSBC
Playback Time (50% volume)About 7 hours
Talking Time (50% volume)About 5 hours
Headset Battery Capacity50mAh
Charging Case Battery Capacity300mAh
Headset Charging TimeAbout 1.5 hours
Charging Case Charging TimeAbout 2 hours
Charging Case Recharges HeadsetsAbout 2.5 times
Charging PortType-C (5V/0.5A)
Waterproof LevelHeadset IPX5, Charging case not waterproof
MaterialABS, Plastic
Maximum Wireless Range10m-20m
Sound IsolatingYes
Earcups TypeSealed
Driver Diameter16.2mm
Impedance RangeUp to 32 Ω
Frequency Response Range20 - 20000Hz
Sensitivity92dB
Resistance32Ω
Vocalism PrincipleDynamic
CommunicationTrue wireless
ConnectorsType-C
StyleEar Hook
FeaturesWaterproof, With microphone, Volume Control, Control Button, AI Noise Cancelling
Monster AC311 Technical Parameters

Detailed technical parameters for the Monster AC311 headphones

Setup Guide

1. Charging the Headphones and Case

Before first use, ensure both the headphones and the charging case are fully charged.

  • Place the headphones into the charging case.
  • Connect the Type-C charging cable to the charging port on the case and to a 5V/0.5A power source.
  • The headphones take approximately 1.5 hours to fully charge. The charging case takes approximately 2 hours to fully charge.
  • A fully charged case can recharge the headphones about 2.5 times.
Monster AC311 Battery Life and Charging Times

Illustration of battery life and charging duration for the AC311

2. Bluetooth Pairing

The Monster AC311 headphones feature automatic pairing for convenience.

  • Open the charging case. The headphones will automatically enter pairing mode.
  • On your device (smartphone, tablet, etc.), enable Bluetooth.
  • Search for "Monster AC311" in the list of available Bluetooth devices and select it to connect.
  • Once connected, the headphones will automatically pair with your device whenever you open the charging case and Bluetooth is enabled on your device.
Bluetooth 5.4 Chip Diagram

Diagram illustrating the advanced Bluetooth 5.4 chip for secure and stable connection

Operating Instructions

The Monster AC311 headphones utilize touch controls for various functions. Refer to the diagram below for specific gestures.

Touch Controls:

  • Answer/Hang up Call: Single tap (x1) on either L or R earbud.
  • Reject Call: Long press (2s) on either L or R earbud.
  • Activate Voice Assistant: Long press (2s) on either L or R earbud.
  • Play/Pause Music: Single tap (x1) on either L or R earbud.
  • Previous Song: Triple tap (x3) on the Left (L) earbud.
  • Next Song: Triple tap (x3) on the Right (R) earbud.
  • Volume Down: Double tap (x2) on the Right (R) earbud.
  • Volume Up: Double tap (x2) on the Left (L) earbud.
Monster AC311 Touch Control Functions

Visual guide to the touch controls for calls and music playback

AI Noise Cancelling for Calls:

The headphones are equipped with Smart AI call noise reduction technology, which effectively filters environmental noise interference, ensuring clearer conversations similar to face-to-face communication.

AI Call Noise Reduction in Use

Illustration of AI noise cancelling technology enhancing call clarity

Restore Factory Settings:

To restore the headphones to their factory default settings, perform 6 consecutive taps on the touch key of both the left and right earbuds while they are powered on. The headphones will automatically power off and reset.

Maintenance

Proper care will extend the life of your Monster AC311 headphones.

  • Cleaning: Gently wipe the earbuds with a soft, dry, lint-free cloth. Do not use harsh chemicals or abrasive materials.
  • Water Resistance: The headphones are IPX5 waterproof, meaning they are resistant to sweat and light splashes of water. They are suitable for exercise and outdoor activities. Note: The charging case is NOT waterproof. Avoid exposing the charging case to water or moisture.
  • Storage: When not in use, store the headphones in their charging case to protect them from dust and damage. Store in a cool, dry place away from extreme temperatures.
  • Battery Care: To maintain battery health, avoid fully discharging the headphones and charging case frequently. Charge them regularly, even if not used for extended periods.
IPX5 Waterproof Rating for Monster AC311 Headphones

Demonstration of the headphones' IPX5 waterproof capabilities

Troubleshooting

If you encounter issues with your Monster AC311 headphones, try the following solutions:

  • No Sound/Connectivity Issues:
    • Ensure the headphones are charged.
    • Make sure Bluetooth is enabled on your device.
    • Try unpairing and re-pairing the headphones with your device.
    • Ensure the headphones are within the 10-20m wireless range of your device.
    • Restart your device and the headphones.
  • One Earbud Not Working:
    • Place both earbuds back into the charging case, close the lid, and then open it again to reset the connection.
    • Try restoring factory settings (see Operating Instructions).
  • Charging Problems:
    • Check the charging cable and adapter for damage.
    • Ensure the charging port on the case is clean and free of debris.
    • Try a different Type-C cable and power source.
  • Touch Controls Unresponsive:
    • Ensure your fingers are clean and dry when using touch controls.
    • Try restarting the headphones by placing them in the case and taking them out.

User Tips

Here are some tips to enhance your experience with the Monster AC311 headphones:

  • Comfortable Fit: The ergonomic ear hook design is meant for stability. Adjust the ear hook gently to find the most comfortable and secure fit for your ear.
  • Open-Ear Awareness: As open-ear headphones, they allow you to stay aware of your surroundings while enjoying audio. This is particularly useful for outdoor activities like running or cycling.
  • Voice Assistant: Utilize the voice assistant feature for hands-free control of your device, making calls, sending messages, or getting directions without touching your phone.
  • Regular Cleaning: Regularly clean the earbuds, especially the sound outlets, to prevent wax buildup and maintain optimal sound quality.
Ergonomic Curved Ear Hook Design for Comfort

The ergonomic design ensures a stable and comfortable fit

Warranty and Support

Your Monster Open Ear AC311 headphones come with a standard manufacturer's warranty. Please refer to the included Warranty Card for detailed terms and conditions. For technical support, service, or warranty claims, please contact the authorized Monster distributor or the point of purchase.

Product Video

Official product video demonstrating unboxing, features, and controls of the Monster Open Ear AC311 headphones.


Monster AC311 Open Ear Wireless Headphones Unboxing and Visual Overview

Monster AC311 Open Ear Wireless Headphones Unboxing and Visual Overview

1:13 • 720×960 • visual_overview
Monster Open Ear AC311 Headphones Unboxing & Feature Demonstration

Monster Open Ear AC311 Headphones Unboxing & Feature Demonstration

0:20 • 720×1280 • feature_demo

Related Documents - AC311

Preview Monster Open Ear AC311 Bluetooth Headphones Quick Start Guide
Concise guide for Monster Open Ear AC311 Bluetooth headphones, covering setup, pairing, charging, operation, and FCC compliance. Features detailed instructions and product overview.
Preview Monster MH22242 Bluetooth Headphones Quick Start Guide
Quick start guide for Monster MH22242 Bluetooth Headphones, covering product overview, charging, wearing, pairing, operations, LED indicators, reset, safety warnings, FCC/IC compliance, and hazardous substance information.
Preview Monster Open Ear AC530 Wireless Earphones Quick Start Guide
Concise quick start guide for Monster Open Ear AC530 wireless earphones (model MH22248), covering product parameters, wireless pairing, power management, call handling, music playback, charging indicators, factory reset, important attention points, and troubleshooting common issues.
Preview Monster Clarity Open Air Wireless Earbuds - User Manual & Product Information
Comprehensive guide to the Monster Clarity Open Air wireless earbuds, featuring an open-ear design, IPX5 sweatproof rating, ENC noise cancellation, 6+ hours playtime, Bluetooth connectivity, and a 2-year limited warranty. Includes setup, operation, and support details.
Preview Monster Open Ear AC336 Quick Start Guide - Bluetooth Earphones
Concise and SEO-optimized HTML guide for Monster Open Ear AC336 Bluetooth earphones, covering setup, pairing, usage, and troubleshooting. Includes product overview, charging, wearing instructions, MFB operations, LED indicators, and FCC statement.
Preview Monster MH22241 Bluetooth Headphones Quick Start Guide
Quick start guide for Monster MH22241 Bluetooth Headphones, covering setup, pairing, operation, and indicator lights. Learn how to use your Monster Open Ear AC390 earbuds.