Magene H303 Heart Rate Sensor

Safety Warnings and Product Information

⚠️ Warning

Failure to notice the potential dangers listed below may lead to severe harm or even fatal accidents.

Battery-related warning

The product uses a CR2032 button cell battery. Failure to follow the instructions listed below may shorten the battery's shelf life, damage the device, or cause fire, chemical burns, battery leakage, or the risk of injury.

• Do not disassemble, modify, puncture, or damage the device or the battery.
• Do not expose the device or the battery to fire, explosion, or other hazards.
• Do not place or store the device near a dryer, in a car under direct sunlight, or in other high-temperature environments.
• Do not immerse the battery in water or other liquids.
• Do not use any sharp object when removing the button cell battery.
• Keep the battery out of reach of children. Swallowing the battery may cause chemical burns, soft tissue perforation, or even death. Seek immediate medical help if the battery is swallowed.

Health-related warnings

• If you are implanted with electronic devices in your body, such as a pacemaker, consult your physician before using the heart rate sensor.
• Data on the heart rate sensor is for reference only and cannot be used for the medical diagnosis, monitoring, treatment, or prevention of any disease. Magene is not responsible for the consequences of any data error.

Our Product

The heart rate sensor monitors your heart rate during sports. It supports ANT+ and Bluetooth wireless protocols, allowing you to send heart rate data to a mobile app, bike computer, sports watch, or any other smart device that supports standard ANT+ and Bluetooth protocols. By recording each and every heartbeat, it enables scientific and pleasant training.

Diagram Description: The diagram shows the components of the heart rate sensor, including the electrodes and the battery holder with a CR2032 battery.

Wearing the Heart Rate Sensor

*To avoid errors in the collected heart rate data, make sure to place the heart rate sensor in the proper direction. Wear the heart rate monitor directly on your skin, just below your chest. It should be snug enough to stay in place during your activity.

1. Wet the electrode areas on the reverse side of the strap.
2. Press the snap studs on the sensor into the snap sockets on the strap, respectively. Be sure to place the heart rate sensor in the proper direction.
   Left L Right R
3. Wrap the strap around your chest and attach the hook to the other end of the strap.
4. Move the sensor to just below your chest and let the electrodes contact your skin.

Placement Illustration for Men

Placement Illustration for Women

5. After the sensor is properly worn, it will automatically turn on, the front LED flashes (turns off after 10 times), select the correct ANT ID or Bluetooth ID on the bike computer, watch, and APP, and the heart rate data will be transmitted.

Diagram Description: The diagram shows the sensor with LED, ANT ID, and Bluetooth ID.

Pairing and Settings

Pairing the heart rate sensor with an ANT+ device

Wear the heart rate sensor before you can pair it with a compatible device. Keep the sensor within 3 meters of the device to be paired and over 10 meters away from other ANT+ devices. When the initial pairing is complete, the compatible device will automatically identify the enabled sensor.

Pairing the heart rate sensor with a Bluetooth device

Wear the heart rate sensor before you can pair it with a compatible device. Keep the sensor within 3 meters of the device to be paired and over 10 meters away from other Bluetooth devices. The sensor cannot be found by directly using Bluetooth on a phone and can only be connected to a Bluetooth device or an app at the same time. When the initial pairing is complete, the compatible device will automatically identify the enabled sensor.

Battery Replacement

Diagram Description: The diagram shows the battery cover with an opening position and a locking position, and a CR2032 battery.

1. Use a coin to rotate the arrow mark on the battery cover anticlockwise from the locking position to the opening position. You can then open the battery holder.
2. Remove the used battery.
3. Place a new battery into the battery holder. Align the arrow mark to the opening position and press down the battery cover. After pressing the whole cover into the battery holder, use a coin to rotate the arrow mark clockwise to the locking position.

*You may have to re-pair the heart rate sensor after battery replacement.

Diagram Description: The diagram shows the battery compartment with a CR2032 battery correctly inserted.

FAQS

1. What apps, bike computers, and sports watches are the heart rate sensor compatible with?
   The heart rate sensor can be connected to apps of peripheral, bike computers, and sports watches that support standard Bluetooth or ANT+ protocols.
2. Follow the instructions below if heart rate data is abnormal or not displayed.
   
   • While wearing the heart rate sensor, check if the LED light is flashing. If not, replace the battery.
   • Wet the electrodes on the strap and adjust the strap length to fit tightly.
   • Please wear cotton clothes. The static electricity created by artificial fibers will interfere with heart rate signals.
   • Stay away from environments that may affect the heart rate sensor.
3. What sports during which I can use the heart rate sensor?
   The heart rate sensor can be used during sports such as cycling, running, and fitness. It cannot be used while swimming.
4. Why I get a "Pairing rejected" message or data is not displayed when I connect the heart rate sensor to Bluetooth on my phone?
   The heart rate sensor only supports searching and connecting via a sports app if you wish to connect it to your phone. The sensor cannot be connected directly through Bluetooth on the phone.
5. How long does the heart rate sensor's battery life last?
   1000 hours battery life.

Maintenance of the Heart Rate Sensor

Note:

• A buildup of too much sweat and salt on the strap can decrease the accuracy of the data measured by the heart rate sensor.
• Wash the strap with clean water after every use.
• Do not put the strap into a washing machine or dryer.
• Please air-dry the strap by hanging it or laying it flat.

Specifications

Contact Information

For more information, contact:

Qingdao Magene Intelligence Technology Co., Ltd.

Website: www.magenefitness.com

After-sales support: support@magenefitness.com