Introduction
The SK27 Smart Watch is a versatile and stylish device designed to enhance your daily life with advanced features for communication, health monitoring, and fitness tracking. This manual provides essential information to help you set up, operate, and maintain your new smartwatch.

Setup Guide
1. Initial Charging
Upon receiving your SK27 Smart Watch, please charge it fully before first use. The watch battery may be low due to long-term logistics. Use the provided magnetic charging cable.
2. App Download and Connection
To unlock the full potential of your smartwatch, you need to download and connect it to the companion application, RDFit.
- Scan the QR code provided in the physical manual (or search for 'RDFit' in your device's app store) to download the RDFit app.
- Ensure your smartphone meets the system requirements: Android 5.0 or above, or iOS 9.0 or above, with Bluetooth 5.0 support.
- Open the RDFit app and follow the on-screen instructions to pair your SK27 Smart Watch via Bluetooth.
Operating Instructions
Basic Navigation
The SK27 Smart Watch features a 1.58-inch HD full-touch control screen and a rotating crown for intuitive navigation.


Communication Features
- Bluetooth Calling: Once connected to your mobile phone, the smartwatch allows you to make and receive calls directly from your wrist, ensuring you never miss important conversations.
- Message Reminders: Receive call reminders, SMS notifications, and alerts from various social media apps (WeChat, QQ, Facebook, Twitter, Instagram, Skype, WhatsApp, Line, Kakao Talk, etc.) directly on your watch.
Customization
- Watch Faces: The watch comes with 6 built-in watch faces. You can choose from these or customize and download more through the RDFit application to match your style.
- Menu Styles: Easily switch between six different menu styles for effortless navigation and a personalized user experience.
- Interchangeable Straps: The SK27 supports interchangeable straps, including stainless steel, silicone, and leather, allowing you to adapt your watch to any occasion.
Smart Features
- AI Voice Assistant: Utilize the built-in AI voice assistant for quick commands, weather inquiries, music control, and more.
- NFC Access Control: The watch supports NFC access unlocking. Simply raise your wrist close to an NFC door lock to quickly open it.
- Music Control: Control your phone's music player directly from your watch, including play/pause, previous, and next track functions.
- Short Video Control: With its built-in smart chip and Bluetooth transmission, the watch supports remote control for short video apps like TikTok, allowing you to like, scroll, and adjust volume.
- Bedside Lamp Mode: Features a gravity-sensing automatic switch for horizontal and vertical screen display. This mode provides a steady, non-dazzling light for night use.

Health Monitoring
The SK27 Smart Watch is equipped with comprehensive health monitoring capabilities to help you stay informed about your well-being.
- Heart Rate Monitor: Continuously monitors your heart rate 24 hours a day, providing real-time data and high heart rate warnings.
- Blood Oxygen Monitor: Pay attention to your blood oxygen health with 24-hour monitoring for real-time insights.
- Sleep Monitor: Tracks your sleep patterns to help you understand and improve your sleep quality.
- Stress Monitor: Helps you manage stress levels throughout your day.

Sports Modes & GPS Tracking
With over 100 professional sports modes and GPS route tracking, the SK27 Smart Watch is your ideal fitness companion.
- Multiple Sports Modes: Choose from over 100 sports modes including rock climbing, parkour, cycling, running, yoga, football, badminton, billiards, tennis, jumping rope, cross-country skiing, snowboarding, mountain biking, hiking, indoor fitness, archery, kite flying, outdoor sports, skateboarding, boxing, and Muay Thai.
- Professional Sports Data Analysis: Track your exercise steps, calories consumed, and mileage. Data is synchronized to the watch display and can be viewed in the mobile app for a comprehensive overview of your fitness journey.
- Outdoor Exploration: Features a compass mode, altitude monitoring, barometric monitoring, and GPS motion trajectory to guide you during outdoor activities.


Maintenance and Care
Water Resistance
The SK27 Smart Watch is IP68 waterproof, designed for daily use and resistant to water and dust. It can withstand splashes, rain, and brief immersion in clear, cold water.
Important Note:
- Do NOT use the watch in a sauna or hot water bath.
- The electronic product is not resistant to seawater or steam.
- Water resistance is not permanently effective and may weaken with wear and tear over time.
- Frequent immersion of the watch is not recommended.

Cleaning
Wipe the watch and strap regularly with a soft, dry cloth. If necessary, use a slightly damp cloth and then dry thoroughly. Avoid using harsh chemicals or abrasive materials.
Troubleshooting
- Watch not turning on: Ensure the watch is fully charged using the magnetic charging cable.
- Connectivity issues: Check that Bluetooth is enabled on your phone and the watch, and that the RDFit app is running. Try restarting both devices.
- App not syncing data: Ensure the watch is properly connected to the RDFit app and that the app has necessary permissions on your phone.
- NFC payment not working: Verify that NFC is enabled on your watch and properly configured within the RDFit app for access control.
User Tips
- Customize your watch face: Explore the RDFit app for a wide variety of watch faces to personalize your device.
- Explore sports modes: Take advantage of the 100+ sports modes to accurately track your workouts and gain insights into your performance.
- Utilize NFC for convenience: Set up NFC access control for quick and easy entry to compatible systems.
Specifications
| Feature | Detail |
|---|---|
| Model | SK27 |
| Display | 1.58 inch HD Full Touch Control, AMOLED, 466*466px Resolution |
| CPU Model | Realtek 8762DT |
| Memory | RAM: 192KB, ROM: 128MB (external Flash) |
| Battery Type | Polymer Lithium Battery |
| Battery Capacity | 400 mAh |
| Charging Time | Approx. 180 minutes |
| Charging Method | Magnetic Charging Cable |
| Bluetooth Version | BLE 5.1 |
| Waterproof Grade | IP68 Life Waterproof |
| App Name | RDFit |
| System Compatibility | Android 5.0+ / iOS 9.0+ |
| Case Material | Steel / Zinc Alloy |
| Band Material | Fine Steel (Interchangeable with Silicone, Leather) |
| Metrics Measured | Heart Rate, Blood Oxygen, Sleep, Stress |
| Voice Assistant | Yes |
| GPS | Yes (for motion trajectory) |
| NFC | Support (for access unlocking) |
| Weight | 70g |
Package Contents
- SK27 Smart Watch Host
- Charging Cable
- Wrist Strap (various options available)
- Instruction Manual
- Retail Box
Warranty and Support
For warranty information and technical support, please refer to the contact details provided by your retailer or visit the official SERVO website. Keep your purchase receipt as proof of purchase.