1. Introduction
The Vsitoo S3 Pro is a 14oz smart self-heating coffee mug designed to maintain your beverages at an optimal temperature. Featuring advanced temperature control, auto-sensing technology, and durable construction, this mug enhances your daily hot beverage experience at home, in the office, or while traveling.

Image 1: Vsitoo S3 Pro Smart Self Heating Coffee Mug in black.
2. What's in the Box
- Vsitoo S3 Pro Smart Mug
- Charging Coaster
- Power Adapter
- Spill-proof Lid
- User Guide

Image 2: The Vsitoo S3 Pro package contents, including the mug, charging coaster, power adapter, and spill-proof lid.
Video 1: An overview of the Vsitoo S3 Plus Smart Mug, demonstrating its features and components.
3. Setup
3.1 Initial Charging
Before first use, ensure the mug is fully charged. Place the mug on the charging coaster and connect the power adapter to a power source. The mug's indicator lights will show charging status.

Image 3: The Vsitoo S3 Pro mug on its charging coaster, highlighting its battery life and extended heat retention when docked.
3.2 Power On/Off
To power on or off, press and hold the button located on the bottom of the mug for 3 seconds. The indicator lights will confirm the status change.
3.3 App Connection
For advanced control, download the Vsitoo app from your smartphone's app store. Ensure your phone's Bluetooth is enabled and follow the in-app instructions to pair your mug. The app allows for customized temperature settings and other features.

Image 4: The Vsitoo S3 Pro mug illustrating its three control methods: AI Sense, One-Touch Control, and App Control.
4. Operating Instructions
4.1 Temperature Control
- Auto-Sensing AI: The mug features a built-in AI sensor that automatically begins heating when it detects liquid, maintaining your last preferred temperature.
- One-Touch Button: Press the button on the bottom of the mug to cycle through preset temperature levels (120°F, 130°F, 140°F, 150°F). Each press increases the temperature by 10°F.
- App Control: Use the Vsitoo app to precisely set your desired temperature within the range of 120°F to 150°F.

Image 5: The Vsitoo S3 Pro mug showcasing its auto-detect and heat feature, which automatically warms beverages to the last set temperature.
4.2 Safety Features
- Dry-Boil Protection: If the mug detects no liquid, it will pause heating and alert you. Heating resumes automatically once refilled.
- Auto-Off Intelligence: The mug automatically shuts off after 2 hours of inactivity, extendable to 4 hours via the app, to conserve battery and ensure safety.

Image 6: The Vsitoo S3 Pro mug illustrating its safety features: dry-boil defense and auto-off intelligence.
5. Maintenance
5.1 Cleaning
The Vsitoo S3 Pro mug is IPX7 waterproof, allowing for easy hand washing. Avoid using abrasive cleaners or scrubbers that could damage the ceramic coating. Do not submerge the charging coaster in water.
5.2 Materials
The mug is crafted with dual-walled 316 stainless steel and features a food-safe ceramic coating. It is BPA-free, ensuring durability and safety.

Image 7: The Vsitoo S3 Pro mug emphasizing its construction from SUS316 Stainless Steel, food-safe ceramic coating, and BPA-free materials.
6. Troubleshooting
- Mug not heating: Ensure the mug is powered on and has sufficient battery. Check if there is liquid in the mug. If using the charging coaster, ensure it is properly connected to power.
- App connectivity issues: Verify Bluetooth is enabled on your smartphone. Ensure the mug is powered on and within range. Try restarting both the app and the mug.
- Battery not charging: Confirm the charging coaster is connected to a working power outlet. Ensure the mug is correctly placed on the coaster.
7. Specifications
| Feature | Detail |
|---|---|
| Capacity | 14oz (approx. 410ml) |
| Maximum Temperature | 150°F (65°C) |
| Temperature Range | 120°F – 150°F (49°C – 65°C) |
| Battery Life | 2-4 hours (on battery), 24 hours (with charging coaster) |
| Materials | Dual-walled 316 Stainless Steel, Food-safe Ceramic Coating |
| Waterproof Rating | IPX7 |
| Item Weight | 1.12 pounds |
| Product Dimensions | 4.72 x 3.5 x 4.8 inches |
| Model Number | S3 Pro |
8. Warranty and Support
For warranty information and customer support, please refer to the contact details provided in your product packaging or visit the official Vsitoo website. Keep your purchase receipt for any warranty claims.







