The R3 transmitter enables you to measure your speed, distance and heart rate in a single device.
The SIGMA STS Run wireless technology sends digitally coded data packages to the receiver within the running computer.
All in One
SPEED – DISTANCE – HEART RATE – The R3 transmitter uses an integrated three-axis acceleration sensor to measure acceleration throughout the run and accurately measure speed and distance. The COMFORTEX+ also records an ECG-accurate heart rate measurement.
The running computer combines three functions in one device: speed, distance and heart rate. And there are no extra accessories.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and value.
Please note: bulky products and bikes shipped to outlying UK regions are excluded from free shipping - Click here for more info.
Christmas is one of the busiest time of year for us at Tredz. We will try our best to get your products delivered before Christmas. To help you, please see our last postage dates for first class and 24 hour courier services below:
Any order dispatched on the 22nd & 23rd December will be delivered between 28th December and 30th December.
Choose your delivery country:
It’s easy to return a product with our 365 day, hassle free returns.
We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
For more information please visit our Returns & Warranty page.