How do you change the battery?

Although the unit is designed NOT to have the battery replaced, it can be done. It takes a CR2032 coin type battery.I followed this video and successfully replaced mine in under ten minutes.https://youtu.be/lBsv9XoV6aA

Is it compatible with a life fitness treadmill? If so how can it be connected?

Yes it is compatible, actually I purchased for same treadmill brand . It is conected automatically by gymlink so no setup is required. Great product .

how do you pair this t31 with compatible treadmill machines with polar sign on it?

Pairing is automatic. Just start your workout and it will sync with a little sweat

Does the t31 work with the iphone 5? I've tried without success using both MapMyRide and the Polar App. Cheers M

The problem is that you need the device to be capable of acquiring data from the transmiter in it's own frequency and I do not think that the iphone is able to do that without a special additional device. For example you have a app called sports tracker that has its own heart rate monitor, I do not know how it works gut there must be some way to catch the information from the heart rate monitor to the phone. For what I know is very probable that you should need some additional device to get the heart rate monitor frequency.

Polar T31 Transmitter | Desertcart EGYPT

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

المساعدة تتبع الطلب

الحساب عربة التسوق

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

المساعدة تتبع الطلب

الحساب عربة التسوق

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E£ 10090

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💓 Stay ahead of the pack with precision heart rate tracking that never quits!

ALL WEATHER DURABILITY - Fully waterproof and built to withstand sweat, rain, and even swimming sessions—train without limits.
ENDURANCE READY BATTERY - Up to 2500 hours of use means your training companion won’t quit before you do.
UNIVERSAL COMPATIBILITY - Works flawlessly with a wide range of Polar monitors and compatible gym equipment—stay connected wherever you train.
PRECISION HEART RATE SYNC - Seamlessly transmits your heart rate with 5kHz coded signal to avoid interference and ensure accuracy.
SLEEK LIGHTWEIGHT COMFORT - Slim, featherlight design fits chest sizes 25-54 inches for all-day wear without distraction.

The Polar T31 Transmitter is a slim, lightweight, and waterproof heart rate transmitter that uses a 5kHz coded signal to deliver accurate heart rate data to a broad range of Polar monitors and compatible gym equipment. Designed for chest sizes 25 to 54 inches, it features a long-lasting battery with up to 2500 hours of use and eliminates signal cross-talk for reliable performance in all training environments.

Specifications

ASIN	B000ARDPPU
Action	add
Batteries	1 CR123A batteries required. (included)
Batteries Included?	Yes
Best Sellers Rank	#93,305 in Sporting Goods ( See Top 100 in Sporting Goods ) #144 in Sports Heart Rate Monitors
Brand	Polar
Color	Black
Compatible with	Polar CS100, Polar CS200cad, Polar CS300, Polar F11, Polar FT2, Polar FT4, Polar FT40, Polar FT60, Polar FT7, Polar FT80, Polar RCX5, Polar RS100, Polar RS300X, Polar RS400
Customer Reviews	4.3 4.3 out of 5 stars (2,773)
Date First Available	6 August 2012
Department	Children's
Description Pile	Lithium-Ion
Display Size	54 Inches
Features	Lightweight design, Slim, Transmits heart rate
Height	0.8 inches
Included Components	Heart Rate Transmitter
Is Discontinued By Manufacturer	No
Item model number	92053125
Length	14.2 inches
Manufacturer	Polar
Material Type	Elasticized-Fabric
Number of Items	1
Power Source	battery-powered
Product Dimensions	0.1 x 0.1 x 0.1 cm; 89 g
Shape	Heart
Size	standart
Skill Level	Advanced
Sport	Excercise & Fitness
Style	Coded
Team	Polar
Weight	0.2 Pounds
Width	3.4 inches

Reviews

S**I

great

The product is excellent, but there is a delivery delay that causes it to take longer than expected.

16.12.2024

L**E

Banda

Funcional con caminadoras

12.02.2025

D**A

Polar, affidabile e pratica.

Perfetta. Polar è sempre una garanzia anche con gli articoli non all’ultima moda. Per chi cerca dati solidi, perfetta.

28.02.2026

ア**連

相性が良い

POLARの機器に使用してますバッテリー交換は出来ませんが機器との相性も良いです。

3.11.2025

R**O

Simplesmente não funciona

Uma droga Não funciona. Além de tudo uma dificuldade para tentar devolver

26.05.2026

J**N

Einwandfrei

Der Gurt funktioniert einwandfrei und verbindet sich mit den Geräten im Fitness-Studio.

24.03.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Best international shipping I've ever tried. Worth every penny!

3 days ago

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