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Optical Heart Rate Armband
Obeat 3
Operation Guide
FEATURES
Wireless technology
- Compatible with sport watch, cycling computer, fitness equipment, and smartphone with Bluetooth® and ANT+.
- Works with most Fitness Apps via Bluetooth® wireless technology.
- Quick connection with NFC-enabled ATTACUS fitness equipment.
Storage function
This wearable device monitors your heart rates and the number of steps you take during exercise. The built-in memory can independently record and store heart rate data and SPM ( steps per minutes); no need to bring your smartphone or wear your watch when exercising. After exercising, you can synchronize the data to Ala Connect through Bluetooth® wireless technology to review the training summary and analysis.
Lightweight and comfortable
The sensor and armband are less than 20 grams; can be worn on the forearm or upper arm.
* This device is for recreational use only; it is not a medical device.
ALA CONNECT APP

Scan the QR Code on the GPT instruction card to download Ala Connect app to enhance your sensor.
System requirements of app installation:
Support iOS 11.0 or later
Support Android 5.1 or later
Built-in Bluetooth 4.0 or later
APP USE AND SENSOR PAIRING
After synchronizing with the Ala Connect, the sensor can be automatically calibrated. To avoid errors in time correction, please synchronize immediately before the initial use and when it is fully charged after a battery drain.
- Press the button once with the white light on to synchronize and turn on sensor.
- Open Ala Connect and add device according to the instructions. User’s profile will be written into the sensor automatically once the device is successfully added and connected. Be sure to turn on Bluetooth® on your smartphone to synchronize.
- Once the synchronization is completed, press the button to turn off.
- Wear the sensor and exercise.
- For recording, press and hold the button until the red light is on; to end the exercise mode, press and hold the button until the red light is on before it turns off (this action will also turn the sensor off ).
- To synchronize your training data with your device wirelessly, press the button for the white light and open both Bluetooth® and Ala Connect on your smartphone.
- The uploaded training data will be stored in the cloud. Log in gptfit.com to check your activity report and results.
PAIRING WITH NFC
NFC is a technology that built quick and short-distance wireless connection between Bluetooth-enabled devices.
- Turn on your sensor.
Turn on the NFC-enabled ATTACUS fitness equipment*. - Bring your sensor close to the “N” touchpoint on the fitness equipment* to pair and connect your sensor with the fitness equipment via Bluetooth® wireless technology.
- Once paired, the indicator for Bluetooth® on the equipment will be on.
* Refer to the ATTACUS fitness equipment operation guide to see if your model supports NFC.
* NFC Tag (Passive)
PART NAMES

HOW TO CHARGE
Please charge the sensor in the first use and when the battery is low (red flashing LED). Please make sure the charging contacts on the back of the sensor with that of the charging dock are clean and dry before charging to prevent any poor connection.
- To charge the sensor, align the charging contacts on the back of the sensor with that of the charging dock. See Figure A.
- Put the sensor into the charging dock as shown in Figure B.
- Connect the USB power port to your computer or plug directly into a USB wall charger.
- The green indicator will flash continuously when charging. Once the battery is fully charged, the green light will stop flashing and remain statically on.
- Take out the sensor from the charging dock by sliding up or down. See Figure C.

HOW TO WEAR
- Slide both ends of the armband through the buckles at both ends of the sensor.
- Wear the sensor on the inside of forearm or upper arm. Please do not wear it on the wrist and avoid any tattoo and hair.
- Adjust the tightness to make sure the sensor fits the arm.
* To ensure the accuracy of the data, you can start wearing it couple minutes before the workout.

http://www.alatech.com/Using%20&%20Function/action-faq-cid-2.htm
OPERATION
The sensor only comes with one button; the operation of different uses is described as follows:
| Charge | Button | Green | Red | White |
| Charging | ||||
| Fully charged | ||||
| Low battery | ||||
| Note 1 | ||||
| When used as an independent training device | ||||
| Turn on and Start Recording | Long press | |||
| Stop Recording and Turn off | Long press | |||
| Manual lap | Press once | |||
| Light Indicate of heart rate | ||||
| Heart rate not detected | ||||
| Heart rate detected Note 2 | ||||
| Synchronizing Data Note 3 | ||||
| Turn on and Synchronizing | Press once | |||
| Stop Syncing and Turn off | Press once | |||
Notes
- The red light flashes when the power is turned on, indicating that the battery is low.
- Once the heart rate is detected, the LED lights will indicate different heart rate zones through different colors.
Heart Rate Zone* Training Int LED
IndicatorTraining Functions %MHR %HRR <Z1 Daily Life ~50 ~55 Blue Z1 Warm Up 50~60 55~60 Aqua Facilitate warm-up and energy recovery Z2 Fat Burn 60~70 60~65 Green Improve metabolism Z3 Aerobic 70~80 65~75 Yellow Enhance aerobic fitness Z4 Anaerobic 80~90 75~85 Orange Increase speed and lactate threshold Z5 Maximum Effort 90~ 85~ Red Anaerobic. Sprinting pace; unsustainable for a long period of time * The sensor will define your heart rate zone according to the age and Maximum Heart Rate (%MHR) or Heart Rate Reserve (%HRR) input in Ala Connect.
- You can transfer the recorded data to Ala Connect Ala Connect via Bluetooth ® wireless technology. Or syncing the settings you changed on Ala Connect Ala Connect to the sensor. Once the synchronization is completed, press the button press the button to turn off.
- The sensor will automatically turn off for power saving after 10 minutes of no action or connection.
- Press and hold the button Press and hold the button for more than 8 seconds at any time/mode will restarted the sensor (with white light on indicating synchronization mode). If you would like to record an exercise, please turn it off with a single press a single press, and then press and hold press and hold until the red light is on.
HOW TO CLEAN
- The sensor is water-proofed. You can clean it with water; be sure to dry it with cloth immediately after washing it.
- It is recommended to wash the armband with water (under 40°C). DO NOT use the brightener, soap or softener. DO NOT soak, iron, dry clean, bleach and twist.
SPECIFICATIONS
| Model Dimension Armband Weight IP rating Memory capacity Operating temperature Charge temperature Wireless transmission interface Wireless transmission frequency Battery Input voltage Run time In the box | OB003 L48×W32×D15.5mm See package for size L 380×25mm or M 260×25mm 13.9 g (armband excluded ) IPX7 Up to 25 of hours training. (Single recording file up to 13 hours) -10~60°C (-14~140°F) 10~45°C (50~113°F) Bluetooth®, ANT+, NFC 2.402~2.480 GHz Rechargeable Lithium battery 5V 20 consecutive hours (max.) Sensor, Armband, Charging dock, GPT instruction card, Operation guide |
PRODUCT WARRANTY
We thank you for purchasing. We provide a one-year manufacturer’s warranty from the date of purchase.
Warranty period:
We provide repair service free of charge but such service will be limited to normal use only. Any damage caused by misuse of users shall not be covered by the warranty hereof.
- We offer a risk free 90 day warranty on all replacement parts that we offer for you. 2) User will pay for postage of replacement products from home to our service center. (Please pack properly)
Non-Warranty Repair Policy: (User needs to pay for the repairs.)
- If malfunction or damage is caused by improper use, disassembly and modification.
- If damage is caused by accident, abuse, misuse, flood, fire, earthquake, any other natural disasters or human negligence.
- Due to normal wear and tear of consumptive parts such as battery, armband, etc.
- If any serial number has been removed or defaced. 5) If it is damaged after the warranty expires.
Model: __________________
Date of purchase: __________
Serial No.*________________
SN:_____________________
Dealer’s Stamp____________
Customer Service__________
Manufacturer_____________
Zhejiang ALA Fitness Technology LTD.
No.405 Tongxin Road, Tongxiang Economic
Development Zone, Zhejiang, China
Zhejiang ALA Fitness Technology LTD.
* The serial number is printed directly on the back of device.
FCC
Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the following two conditions:
- This device may not cause harmful interference.
- This device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the Federal Communications Commission (FCC) rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by doing one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Caution
Any changes or modifications not expressly approved by the party responsible for compliance could void the user‘s authority to operate the equipment.
The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End users must follow the specific operating instructions for satisfying RF exposure compliance. To maintain compliance with FCC exposure compliance requirement, please follow operation instruction as documented in this manual.
Please dispose of used batteries properly, following local regulations. Do not incinerate.
2PF297420080008, 2021/2 V1.1
* Refer to the ATTACUS fitness equipment operation guide to see if your model supports NFC.


















