MBUPAI CK-W355
MBUPAI CK-W355 Digital Wrist Blood Pressure Monitor User Manual
Model: CK-W355
Introduction
This manual provides detailed instructions for the safe and effective use of your MBUPAI CK-W355 Digital Wrist Blood Pressure Monitor. Please read this manual thoroughly before using the device and keep it for future reference. This monitor is designed for home use to measure systolic and diastolic blood pressure and pulse rate on the wrist.
Included Components
Your MBUPAI CK-W355 package includes the following items:
- Wrist Blood Pressure Monitor
- USB Charging Cord
- Storage Case
- Instruction Manual (this document)
- Quick Start Guide
Product Overview
The MBUPAI CK-W355 is a compact and user-friendly digital wrist blood pressure monitor featuring a large LCD display and voice broadcast for easy reading of measurements. It supports two users with 90 memory readings each, allowing for tracking of health trends over time. The device is rechargeable via USB, offering convenience and portability.

Figure 1: The MBUPAI CK-W355 Digital Wrist Blood Pressure Monitor worn on a user's wrist, displaying blood pressure readings.
Key Features:
- Large LCD Display: Clear and easy-to-read digits for systolic, diastolic, and pulse readings.
- Voice Broadcast: Announces measurement readings for high pressure, low pressure, and heartbeats, beneficial for users with visual impairments.
- Dual User Mode: Supports two individual users, each with 90 memory slots for historical data.
- USB Rechargeable: Convenient charging via USB cable, eliminating the need for frequent battery replacement.
- Adjustable Wrist Cuff: Designed to fit wrist circumferences from 5.3 to 7.7 inches.
- One-Button Operation: Simplifies the measurement process for quick and easy readings.

Figure 2: Detailed view of the monitor's display, showing the WHO blood pressure level bar, user indicators, memory number, and the 'S' (Setting), Power, and 'M' (Memory) buttons.
Setup
1. Charging the Device:
Before first use, ensure the blood pressure monitor is fully charged. Connect the provided USB charging cord to the monitor's charging port and plug the other end into a USB power source (e.g., computer, power bank, or USB wall adapter). A full charge typically takes 2-3 hours.

Figure 3: The blood pressure monitor being charged via a USB cable, illustrating its rechargeable capability.
2. Setting Date and Time (if applicable):
Refer to the Quick Start Guide for initial setup of date and time. This ensures accurate timestamping of your measurement records.
3. Applying the Wrist Cuff:
- Sit comfortably with your arm resting on a flat surface.
- Place the monitor on your left wrist with the display facing upwards and your palm facing up.
- Ensure the monitor is positioned approximately 1-2 cm from your palm.
- Wrap the cuff snugly around your wrist. It should be firm but not uncomfortably tight.
- Position your wrist at heart level during measurement.
Operating Instructions
Taking a Measurement:
- Ensure the cuff is correctly applied to your wrist and your arm is positioned at heart level.
- Press the central ON/OFF button (⑂) to start the measurement. The cuff will automatically inflate.
- Remain still and silent during the measurement process.
- Once the measurement is complete, the systolic pressure, diastolic pressure, and pulse rate will be displayed on the LCD screen.
- The device will also provide a voice broadcast of your readings.

Figure 4: Illustration of the clear voice broadcast feature, announcing blood pressure and pulse readings.
To turn off the device, press the ON/OFF button again, or it will automatically shut off after a period of inactivity to conserve power.
Memory Function
The MBUPAI CK-W355 monitor stores up to 90 readings for each of two users (User 1 and User 2), totaling 180 memory slots. This allows you to track your blood pressure trends over time.
Accessing Memory Records:
- With the device off, press the 'M' (Memory) button.
- The display will show the average of the last three readings.
- Press the 'M' button repeatedly to scroll through individual past readings, from most recent to oldest.
- To switch between User 1 and User 2 records, use the 'S' (Setting) button while in memory mode.

Figure 5: Visual representation of the dual-user memory function, indicating 90 memories for User 1 and 90 for User 2.
Clearing Memory Records:
Consult the Quick Start Guide or full instruction manual for specific steps on how to clear memory records, if desired.
Charging
The MBUPAI CK-W355 features a built-in rechargeable battery. When the battery indicator on the display shows low power, or the device does not turn on, it's time to recharge.
- Use the provided USB charging cable.
- Connect the small end of the cable to the charging port on the side of the monitor.
- Connect the standard USB end to a 5V-1A USB power adapter, computer USB port, or power bank.
- Charging typically takes 2-3 hours for a full charge.
- Avoid using fast chargers or chargers with higher voltage/amperage than specified to prevent damage to the device.
Maintenance and Care
- Cleaning: Wipe the monitor and cuff gently with a soft, dry cloth. If necessary, use a cloth lightly dampened with water or a mild detergent, then wipe dry immediately. Do not use abrasive cleaners or immerse the device in water.
- Storage: Store the device in its provided carrying case when not in use. Keep it in a cool, dry place, away from direct sunlight, extreme temperatures, and humidity.
- Avoid Impact: Do not drop the monitor or subject it to strong shocks.
- Do Not Disassemble: Do not attempt to open or repair the device yourself. Contact customer support for any issues.
Troubleshooting
If you encounter issues with your MBUPAI CK-W355 monitor, 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 using the USB charging cable for 2-3 hours. |
| Inaccurate or inconsistent readings. | Incorrect cuff placement, movement during measurement, or improper body position. | Ensure the cuff is snugly applied 1-2 cm from the palm, palm facing up. Remain still and silent, and keep your wrist at heart level during measurement. Avoid caffeine, alcohol, or smoking 30 minutes prior. |
| Cuff does not inflate or inflates too little/much. | Cuff not properly connected (if detachable, though this is a wrist unit), or air leakage. | Check cuff connection. Ensure there are no holes or damage to the cuff. If issues persist, contact customer support. |
| Voice broadcast not working. | Voice function might be turned off or volume too low. | Refer to the Quick Start Guide or full manual for instructions on adjusting voice settings. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | CK-W355 |
| Brand | MBUPAI |
| Display Type | LCD |
| Measurement Site | Wrist |
| Power Source | Battery Powered (USB Rechargeable) |
| Memory Capacity | 180 readings (90 for User 1, 90 for User 2) |
| Cuff Size | Adjustable, 5.3 - 7.7 inches (13.5 - 19.5 cm) |
| Item Weight | 7.7 Ounces |
| Age Range (Description) | Adult |

Figure 6: Approximate dimensions of the MBUPAI CK-W355 monitor: 7.5cm/2.95in (height), 6.5cm/2.55in (width), 3cm/1.18in (depth).
Warranty and Support
For warranty information, technical support, or any questions regarding your MBUPAI CK-W355 Digital Wrist Blood Pressure Monitor, please contact the manufacturer or your point of purchase. Retain your purchase receipt for warranty claims.
For further assistance, please visit the official MBUPAI website or contact their customer service department. Contact details are typically found on the product packaging or the Quick Start Guide.
Important Safety Information
- This device is intended for non-invasive measurement and monitoring of arterial blood pressure. It is not intended for use in infants or children.
- Do not use this device if you have a serious arrhythmia.
- Consult your physician before using this device if you have any medical conditions, especially if you are pregnant or suffer from pre-eclampsia.
- Self-measurement is not diagnosis. Always consult a healthcare professional for interpretation of your blood pressure readings.
- Do not adjust medication based on measurements from this device without consulting your doctor.
- Keep the device out of reach of children and pets.
Official Product Videos
No official product videos from the seller were found for this product at this time. Please refer to the written instructions and diagrams provided in this manual for guidance.
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