1. Introduction
Thank you for choosing the Monster Sleep Ear100 Earbuds. These earbuds are specifically designed to provide a comfortable and immersive audio experience, particularly for side sleepers. Featuring stereo sound, Environmental Noise Cancelling (ENC), Bluetooth 6.0 connectivity, and IPX6 waterproofing, they are engineered for undisturbed sleep and versatile daily use. Please read this manual thoroughly to understand the features and proper operation of your new earbuds.

Image: Monster Sleep Ear100 Earbuds in their open charging case, showcasing the compact design.
2. What's in the Box
Upon unboxing your Monster Sleep Ear100 Earbuds, you should find the following components:
- Monster Sleep Ear100 Earbuds (1 pair)
- Charging Case (1 unit)
- Type-C Charging Cable (1 unit)
- User Manual (this document)
- Multiple sizes of hypoallergenic silicone ear tips for optimal fit

Image: The complete package contents of the Monster Sleep Ear100 Earbuds.
3. Product Overview & Features
The Monster Sleep Ear100 Earbuds are engineered with several key features to enhance your listening and sleep experience:
- Side Sleeping Comfort: Ultra-minimalist design with pliable, hypoallergenic silicone tips for comfort during side sleeping.
- Sleep Mode: A dedicated mode to silence notifications, disable accidental touch controls, and eliminate low battery beeps for undisturbed rest.
- Pure Monster Sound: Decreased distortion, immersive stereo sound, deep bass, and rich studio-quality audio.
- Multiple Noise Reduction: Environmental Noise Cancelling (ENC) microphone reduces background noise for clear communication, effectively blocking up to 30dB of noise.
- Extended Battery Life: Up to 8 hours of playback on a single charge, and up to 32 hours with the charging case.
- Bluetooth 6.0: Advanced chipset for easy, fast pairing and a stable, anti-interference connection up to 15 meters.
- IPX6 Waterproof: Strong protection against splashing water and excessive sweating, suitable for various activities.
- Touch Control: Intuitive one-tap controls for music playback, calls, and mode switching.

Image: Ergonomic design for side sleeping comfort.

Image: Internal components showcasing Pure Monster Sound technology.

Image: Multiple noise reduction for clear audio.
4. Setup
4.1 Initial Charge
Before first use, fully charge your earbuds and charging case. Connect the provided Type-C charging cable to the charging port on the case and a compatible USB power source. The indicator lights on the case will show charging status.
4.2 Pairing with Your Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your device (smartphone, tablet, etc.), go to Bluetooth settings.
- Select "Monster Sleep Ear100" from the list of available devices.
- Once connected, you will hear an audio prompt, and the earbuds will be ready for use.
The earbuds feature an intelligent automatic reconnection system. Once paired, they will automatically connect to the last paired device when the case is opened.

Image: Bluetooth 6.0 technology for fast and stable connection.
5. Wearing Instructions
For optimal sound quality, comfort, and secure fit, especially for side sleeping, follow these steps:
- Select the correct size ear tips that provide a snug seal in your ear canal.
- Gently insert the earbud into your ear, ensuring the silicone ear wing is positioned correctly within your ear's concha.
- Twist the earbud slightly to lock it into place, creating a comfortable and secure fit.
The low-profile design ensures minimal protrusion, making them ideal for side sleepers without causing discomfort.

Image: How to wear the earbuds for better sleep.
6. Operating Instructions
6.1 Touch Controls
The Monster Sleep Ear100 Earbuds feature intuitive touch controls on each earbud. Refer to the diagram below for specific functions:

Image: Simple taps for total control.
- Play/Pause: Single tap on either L/R earbud.
- Next Track: Triple tap on the R earbud.
- Previous Track: Triple tap on the L earbud.
- Answer/End Call: Double tap on either L/R earbud.
- Reject Call: Press and hold either L/R earbud for 2 seconds.
- Activate Voice Assistant: Press and hold the L earbud for 2 seconds.
- Activate Sleep Mode: Press and hold the R earbud for 2 seconds.
Note: After entering Sleep Mode, the touch function of the earphones will be unavailable. You can only switch the mode by pressing and holding the right earphone for 2 seconds.
6.2 Sleep Mode
Activate Sleep Mode to ensure an uninterrupted sleep experience. This mode disables accidental touch controls, silences notifications, and eliminates low battery beeps. To activate/deactivate, press and hold the R earbud for 2 seconds.
7. Charging
The earbuds provide up to 8 hours of listening time on a single charge. The portable charging case extends this to a total of 32 hours. To charge the earbuds, place them back into the charging case. To charge the case, connect it to a power source using the provided Type-C cable.

Image: Battery life indication for earbuds and charging case.
8. Maintenance
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Ear Tips: Remove and clean the silicone ear tips periodically with mild soap and water. Ensure they are completely dry before reattaching.
- Storage: Store the earbuds in their charging case when not in use to protect them and keep them charged.
- Water Exposure: While IPX6 waterproof, avoid prolonged submersion in water. Dry thoroughly if exposed to moisture.
9. Troubleshooting
- No Sound: Ensure earbuds are charged, connected to your device, and volume is up.
- Pairing Issues: Place earbuds back in the case, close and reopen. On your device, forget the earbuds and attempt to re-pair.
- Uncomfortable Fit: Try different sizes of silicone ear tips to find the best fit for your ears.
- Accidental Touches: Activate Sleep Mode to disable touch controls during sleep.
- Low Battery Beeps: Ensure Sleep Mode is active to prevent these notifications during rest.
10. Specifications
| Feature | Specification |
|---|---|
| Model Name | W57 |
| Connectivity Technology | Wireless (Bluetooth 6.0) |
| Noise Control | Environmental Noise Cancellation (ENC) |
| Form Factor | In Ear |
| Water Resistance Level | IPX6 Water Resistant |
| Control Type | Touch Control |
| Battery Life (Single Charge) | Up to 8 hours |
| Total Battery Life (with Case) | Up to 32 hours |
| Charging Interface | USB Type C |
| Material | Plastic |
| Color | Black |
11. Warranty and Support
For warranty information and customer support, please refer to the official Monster website or contact your retailer. Keep your proof of purchase for any warranty claims.


