Monster E57
Monster Mission 200 Bluetooth Headphones User Manual
Model: E57
Introduction
Welcome to the Monster Mission 200 Bluetooth Headphones user manual. This guide provides detailed instructions on how to set up, operate, and maintain your headphones to ensure the best possible audio experience. The Monster Mission 200 headphones offer Pure Monster Sound, multiple EQ modes, comfortable design, and long battery life, making them ideal for various uses from home office to travel.
What's in the Box
Upon unboxing your Monster Mission 200 headphones, please verify that all the following components are included:
- Monster Mission 200 Headphones
- 3.5 mm Audio Cable
- USB Charging Cable (Type-C)
- User Manual (this document)

Image: The Monster Mission 200 headphones along with the 3.5mm audio cable and USB charging cable.
Product Overview
The Monster Mission 200 headphones are designed for superior audio quality and user comfort. Key features include:
- Pure Monster Sound & 3 EQ Modes: Experience rich audio with customizable sound profiles (Voice, Class, Jazz).
- Comfortable & Foldable Design: Skin-friendly PU leather earcups and an adjustable headband ensure a comfortable fit for extended use. The foldable design allows for easy portability.
- Bluetooth 5.4 & 60H Battery Life: Enjoy stable wireless connectivity and up to 60 hours of playtime on a single charge.
- 40MM Dynamic Drivers & AI Call Noise Cancellation: Powerful drivers deliver immersive sound, while AI noise cancellation ensures clear voice calls.
Headphone Components and Controls

Image: Detailed diagram illustrating the location and function of the Volume +, Volume -, ON/OFF button, 3.5mm Audio Port, Type-C Charging Port, Microphone, and EQ Mode Switching button on the Monster Mission 200 headphones.
- Volume +: Increase volume.
- Volume -: Decrease volume.
- ON/OFF Button: Power the headphones on or off.
- 3.5mm Audio Port: For wired connection using the included audio cable.
- Type-C Charging Port: Connect the USB charging cable for power.
- Microphone: For voice calls and voice commands.
- EQ Mode Switching: Cycle through Voice, Class, and Jazz EQ modes.
Setup Guide
1. Charging the Headphones
Before first use, fully charge your Monster Mission 200 headphones. A full charge provides up to 60 hours of playtime.
- Connect the provided USB Type-C charging cable to the charging port on the headphones.
- Connect the other end of the USB cable to a compatible USB power source (e.g., wall adapter, computer USB port).
- The LED indicator on the headphones will show the charging status. It will typically turn off or change color once fully charged.

Image: Illustration demonstrating the long battery life of the Monster Mission 200 headphones, emphasizing up to 60 hours of playtime.
2. Bluetooth Pairing
Pair your headphones with your Bluetooth-enabled device (smartphone, tablet, laptop) for wireless audio.
- Ensure the headphones are powered off.
- Press and hold the ON/OFF button for approximately 3-5 seconds until the LED indicator flashes rapidly (usually blue and red), indicating pairing mode.
- On your device, go to Bluetooth settings and turn Bluetooth on.
- Search for available devices. Select "Monster Mission 200" from the list.
- Once connected, the LED indicator on the headphones will typically show a solid blue light or flash slowly.
Note: The headphones will automatically attempt to reconnect to the last paired device when powered on.
Operating Instructions
Power On/Off
- Power On: Press and hold the ON/OFF button for 2 seconds.
- Power Off: Press and hold the ON/OFF button for 3 seconds.
Music Playback
- Play/Pause: Press the ON/OFF button once.
- Volume Up: Press the Volume + button.
- Volume Down: Press the Volume - button.
- Next Track: Press and hold the Volume + button.
- Previous Track: Press and hold the Volume - button.
Call Management
- Answer/End Call: Press the ON/OFF button once.
- Reject Call: Press and hold the ON/OFF button for 2 seconds.
- Activate Voice Assistant: Double-press the ON/OFF button.
EQ Mode Switching
The Monster Mission 200 headphones feature three distinct EQ modes to optimize your listening experience:
- Voice Mode: Enhances vocal clarity, ideal for podcasts, audiobooks, and online lectures.
- Class Mode: Balanced sound profile suitable for classical music and general listening.
- Jazz Mode: Boosts bass and treble for a more dynamic and lively sound, perfect for jazz and contemporary music.
To switch between EQ modes, press the dedicated EQ Mode Switching button located on the earcup.

Image: A person relaxing and enjoying music, illustrating the benefit of the three distinct EQ modes (Hi-Fi Audio, 3 Mode Equalizer, Pure Monster Sound) available on the Monster Mission 200 headphones.
Wired Connection (3.5mm Audio Cable)
You can use the headphones in wired mode even if the battery is depleted or for devices without Bluetooth connectivity.
- Plug one end of the 3.5mm audio cable into the 3.5mm audio port on the headphones.
- Plug the other end into the audio output jack of your device.
- In wired mode, the headphone's power and Bluetooth functions are disabled. Audio control will be managed by your connected device.

Image: A visual comparison showing the Monster Mission 200 headphones used in both wireless (Bluetooth) and wired (3.5mm cable) modes, highlighting versatility.
Maintenance and Care
To ensure the longevity and optimal performance of your Monster Mission 200 headphones, follow these care guidelines:
- Cleaning: Use a soft, dry, lint-free cloth to clean the headphones. Do not use abrasive cleaners, alcohol, or chemical solvents.
- Storage: When not in use, store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures. The foldable design allows for compact storage.
- Water Resistance: These headphones are not water-resistant. Avoid exposure to liquids, moisture, or humidity.
- Avoid Impact: Do not drop or subject the headphones to strong impacts, as this can damage internal components.
- Charging: Only use the provided charging cable and a compatible power source.
Troubleshooting
If you encounter any issues with your Monster Mission 200 headphones, please refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| Headphones do not power on. | Ensure the headphones are charged. Connect to a power source and allow time to charge. |
| Cannot pair with device. |
|
| No sound or low volume. |
|
| Poor call quality. |
|
Specifications
| Feature | Detail |
|---|---|
| Model Name | MH22201 |
| Item Model Number | E57 |
| Connectivity Technology | Wireless (Bluetooth), Wired (3.5mm Jack) |
| Wireless Communication Technology | Bluetooth 5.4 |
| Audio Driver Type | 40MM Dynamic Drivers |
| Battery Life | Up to 60 Hours |
| Frequency Range | 20Hz - 20,000Hz |
| Noise Control | AI Call Noise Cancellation |
| Ear Placement | Over Ear |
| Product Dimensions | 1 x 1 x 1 inches |
| Item Weight | 13.7 ounces |
| Water Resistance Level | Not Water Resistant |
| UPC | 810079703456 |
Warranty and Support
Monster stands behind the quality of its products. For the Monster Mission 200 Bluetooth Headphones, the following support is provided:
- Refund Guarantee: One-year refund guarantee.
- Warranty: Two-year warranty.
- Lifelong Support: Lifelong user support is available.
For any questions, concerns, or technical assistance, please contact Monster customer support. They aim to respond and provide satisfaction within 12 hours.
Please refer to the contact information provided on the official Monster website or your purchase documentation for the most up-to-date support channels.
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