Introduction
This manual provides detailed instructions for the proper use and care of your Q&Q MD02-205 Radio-Controlled Solar Wristwatch. Please read this manual thoroughly before using your watch to ensure optimal performance and longevity. This watch features solar power, radio-controlled timekeeping, 10 ATM water resistance, and various digital functions.
Product Overview
The Q&Q MD02-205 is a sophisticated timepiece combining analog and digital displays with advanced features. Key components include:
- Analog Display: Hour, minute, and second hands.
- Digital Display: Shows time, date, day, and other functions.
- Control Buttons: Used for setting and operating various functions.
- Solar Panel: Converts light into electrical energy to power the watch.
- Metal Band: Durable and adjustable for comfortable wear.

Image: Front view of the Q&Q MD02-205 watch, displaying its analog and digital components, with the brand logo and "RADIO CONTROLLED SOLAR MATE" text visible.

Image: Side view of the Q&Q MD02-205 watch, highlighting the black control buttons on the right side of the watch case.

Image: Back view of the Q&Q MD02-205 watch, showing the stainless steel case back with engraved specifications and the metal bracelet with its clasp open.
Setup
1. Initial Charge
Your Q&Q MD02-205 watch is powered by solar energy. Before initial use, ensure the watch is sufficiently charged. Expose the watch face to a bright light source (natural sunlight is ideal) for several hours. The watch has an overcharge prevention function and a charging warning function.

Image: Diagram showing the solar cell and movement, explaining how light energy is converted and stored. A table provides estimated charging times under various light conditions (e.g., 500 Lux indoors, 10000 Lux direct sunlight) to reach operational status or full charge.
2. Radio Wave Reception
This watch automatically receives radio waves to set the correct time. It supports reception from 2 stations in Japan, China, Germany, and the United States. For optimal reception, place the watch near a window at night. Manual reception can also be initiated.

Image: A world map illustrating the reception ranges for radio time signals from Japan (JJY 40kHz, JJY 60kHz), China (BPC 68.5kHz), USA (WWVB 60kHz), and Germany (DCF77 77.5kHz).
3. Adjusting the Metal Band
The metal band features a trifold free adjustment mechanism. If adjustment is needed, it is recommended to visit a professional jeweler or watch repair service to ensure proper fitting and avoid damage.
Operating Instructions
The watch features multiple functions accessible via its control buttons. Refer to the detailed function list below for specific operations.
Key Functions:
- Power Source: Solar power.
- Time Display: Analog (hour, minute, second) and Digital (hour, minute, day or month, day, day of week). Switchable between 12/24-hour format.
- Calendar Display: Full auto-calendar up to 2099, including day and date. Supports Summer Time function.
- Time Accuracy: Radio-controlled for precise timekeeping. Average monthly difference of ±30 seconds if radio reception is not performed.
- Alarm: Daily alarm with ON/OFF function, targets home time.
- Hourly Time Signal: Chimes every hour (00 minutes) with ON/OFF function, targets home time.
- Dual Time: Displays a second time zone, settable in 15-minute increments.
- Chronograph: Measures up to 23 hours, 59 minutes, 59 seconds with 1/100 second accuracy. Includes split time measurement function.
- LED Light: Illuminates the digital display for approximately 2 seconds per press.
- Radio Wave Reception: Supports 4 regions and 5 stations (Japan 2 stations, China, Germany, USA). Features scheduled automatic reception (up to twice a day) and manual forced reception.
- Power Saving Function: Digital display turns off to save power if no button operation is performed for 30 minutes or more in a dark place between 0:00 AM and 4:30 AM.
- Overcharge Prevention: Prevents further charging once the secondary battery is full.
- Continuous Operation Time: Approximately 12 months after full charge (without further charging) or 18 months (stored with power saving active).
- Charging Warning: Analog second hand moves in 2-second increments when battery is critically low, disabling LED light, alarm, chronograph, reception, and hourly signal functions.
- Reference Position Confirmation: Allows checking and correcting hand alignment if misaligned due to impact or static electricity.

Image: A detailed list of the watch's functions, presented in a table format, covering solar power, time display, calendar, time accuracy, alarm, hourly signal, dual time, chronograph, LED light, radio wave reception, power saving, overcharge prevention, continuous operation time, charging warning, and reference position confirmation.
Maintenance
1. Charging
To maintain optimal performance, regularly expose your watch to light. Avoid prolonged storage in dark places. The watch has a full charge duration of approximately 12 months without light exposure (in power-saving mode) or 18 months (with power-saving mode activated).
2. Cleaning
Wipe the watch case and band with a soft, dry cloth. For metal bands, a slightly damp cloth can be used, followed by a dry cloth. Avoid using chemical cleaners or solvents.
3. Water Resistance
The watch is water-resistant to 10 ATM (100 meters). This means it is suitable for everyday use, showering, swimming, and snorkeling. Do not operate buttons underwater. After exposure to saltwater, rinse the watch with fresh water and dry thoroughly.
Troubleshooting
- Watch not keeping accurate time:
Ensure the watch is receiving radio signals. Place it near a window overnight. If issues persist, manually initiate radio wave reception. Check the reference position of the hands if they appear misaligned due to impact or static electricity.
- Digital display is blank or dim:
The watch may be in power-saving mode or require charging. Expose it to bright light for several hours. If the charging warning function is active, the battery level is low.
- Buttons are unresponsive:
Ensure the watch is not in a locked mode (if applicable, refer to specific button operations). If the watch is fully discharged, some functions may be temporarily disabled until sufficient charge is accumulated.
Specifications
| Model Number | MD02-205 |
| Power Source | Solar Power |
| Timekeeping | Radio-Controlled (Japan 2 stations, China, Germany, USA) |
| Water Resistance | 10 ATM (100 meters) |
| Functions | Analog/Digital Time, Full Auto Calendar, Alarm, Hourly Signal, Dual Time, Chronograph (1/100 sec), LED Light, Power Saving, Overcharge Prevention, Charging Warning, Reference Position Confirmation |
| Battery Type | 1 Lithium Ion battery (included, rechargeable) |
| Band Material | Metal (Stainless Steel) |
| Package Dimensions | 12 x 8.2 x 5.8 cm |
| Weight | 107 g |
| Country of Origin | China |
Warranty and Support
For warranty information and customer support, please refer to the warranty card included with your product or visit the official Q&Q website. Keep your purchase receipt as proof of purchase.
Manufacturer: Q&Q





