1. Introduction
Thank you for choosing the Mesterstar Automatic Male Masturbator. This manual provides detailed instructions for the safe and effective use, maintenance, and care of your device. Please read this manual thoroughly before first use and retain it for future reference.

Image 1.1: Mesterstar Automatic Male Masturbator. This image displays the device in its assembled form, highlighting its black and red exterior design.
2. Product Overview
The Mesterstar Automatic Male Masturbator is designed to provide a stimulating experience with its unique features. Key components and functionalities include:
- Automatic Suction: Features a powerful suction mechanism with a maximum duration of 5 seconds per cycle, designed to create an immersive sensation.
- 7 Suction & 7 Vibration Modes: Offers a variety of patterns for both suction and vibration, which can be controlled independently to customize the experience.
- 2-in-1 Design: The inner sleeve can be removed and used separately as a physical suction cup.
- Realistic Texture: The inner sleeve is made from soft, flexible Thermoplastic Elastomer (TPE) material with internal textures for enhanced stimulation.
- Quiet Operation: Engineered for discreet use, with a maximum noise level of 45 dB.
- USB Rechargeable: Convenient charging via a standard USB cable.
- Easy to Clean: Detachable inner sleeve for straightforward cleaning.

Image 2.1: Overview of the Mesterstar Automatic Male Masturbator. This diagram illustrates the device's internal mechanism, highlighting the deep suction capability and the 7.0-inch insertable length.

Image 2.2: Illustration of the 5-second deep suction feature. This graphic shows the internal sleeve and the airflow creating a vacuum effect for prolonged suction.
3. Package Contents
Upon opening the package, please verify that all items are present:
- 1 x Mesterstar Automatic Male Masturbator
- 1 x USB Charging Cable
- 1 x User Manual (this document)

Image 3.1: Contents of the Mesterstar Automatic Male Masturbator package. This image displays the main device, the inner sleeve, the USB charging cable, and the user manual.
4. Charging Instructions
Before first use, fully charge the device. To charge:
- Locate the charging port on the device.
- Connect the provided USB charging cable to the device and to a compatible USB power source (e.g., computer, USB wall adapter).
- The indicator light will illuminate during charging and change color or turn off when fully charged.
- Disconnect the cable once charging is complete.
Note: Do not operate the device while it is charging.
5. Operating Instructions
To begin using your Mesterstar Automatic Male Masturbator:
- Ensure the device is fully charged.
- Apply a generous amount of water-based lubricant to the inner sleeve opening and to yourself.
- Press the power button to turn on the device.
- Use the control buttons to select your desired suction and vibration modes. The device offers 7 distinct suction patterns and 7 powerful vibration modes, which can be operated independently.
- Insert yourself into the sleeve. The device will begin its automatic functions according to the selected modes.
- To turn off the device, press and hold the power button.
Tip: Experiment with different suction and vibration combinations to find your preferred settings.
6. Maintenance and Cleaning
Proper cleaning and maintenance ensure hygiene and prolong the lifespan of your device.
6.1 Disassembly for Cleaning
- Ensure the device is turned off.
- Gently twist and pull the inner sleeve out from the main body of the device.
6.2 Cleaning the Inner Sleeve
- Rinse the inner TPE sleeve thoroughly under warm running water.
- Use a mild, toy-safe soap or specialized toy cleaner to clean the sleeve.
- Rinse again thoroughly to remove all soap residue.
- Allow the sleeve to air dry completely before reassembly or storage.
6.3 Cleaning the Main Body
- Wipe the exterior of the main device body with a damp cloth.
- Do not submerge the main body in water, as it contains electronic components.
- Ensure the charging port is dry before charging.
6.4 Reassembly
- Once the inner sleeve is completely dry, carefully reinsert it into the main body, aligning any grooves or indicators.
- Ensure it is securely seated before storage or next use.

Image 6.1: Step-by-step guide for disassembling and cleaning the device. This graphic illustrates how to remove the inner sleeve, apply lubricant, and clean the components.
7. Troubleshooting
If you encounter any issues with your device, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery or no charge. | Charge the device fully using the provided USB cable. |
| Suction/Vibration is weak. | Low battery. Incorrect mode selected. | Recharge the device. Cycle through the modes to ensure the desired intensity is selected. |
| Device stops unexpectedly. | Low battery. Overheating (unlikely for this device type but possible). | Recharge the device. Allow the device to cool down if it feels warm. |
| Difficulty cleaning the sleeve. | Residue buildup. | Ensure thorough rinsing immediately after use. Use warm water and a mild, toy-safe soap. |
If the problem persists after attempting these solutions, please contact Mesterstar customer support for further assistance.
8. Specifications
| Brand | Mesterstar |
| Model Number | B0BD4QGGKL |
| Material | Thermoplastic Elastomer (TPE) |
| Color | White (Inner Sleeve), Black/Red (Outer Casing) |
| Dimensions (Overall) | Approximately 10.43 x 3.62 x 3.62 inches |
| Weight | Approximately 1.81 Pounds |
| Insertable Length | Up to 7 inches |
| Water Resistance Level | Waterproof (for cleaning the sleeve, main body is not submersible) |
| Noise Level | Max 45 dB |
| Power Source | USB Rechargeable |

Image 8.1: Detailed product dimensions. This diagram provides measurements for the overall device and its internal components.
9. Safety Information
- This product is intended for adult use only.
- Always clean the device thoroughly before and after each use.
- Use only water-based lubricants with this device. Oil-based lubricants can damage the TPE material.
- Do not use the device if you notice any damage to the material or electronic components.
- Discontinue use immediately if you experience any discomfort or irritation.
- Keep out of reach of children.
- Store in a cool, dry place away from direct sunlight and extreme temperatures.
10. Warranty and Support
Mesterstar is committed to providing high-quality products. For any questions, concerns, or support needs regarding your Mesterstar Automatic Male Masturbator, please contact our customer service team. Refer to the product packaging or the Mesterstar official website for contact information.
Please note that specific warranty terms may vary by region and retailer. Keep your proof of purchase for warranty claims.





