If Speed and Cadence functions are used together, you need to buy two. Reinstall the battery to switch the speed mode to Cadence mode. 2 X Speed Cadence Sensors. Sensor: Geomagnetic sensor. Wireless interface: Bluetooth-compatible/ANT+.
eBay
Bicycle Computer Holder Stem Top Cap GPS Speedometer Mount Bracket Bike Stopwatch Fixed Holder Base For Garmin Bryton CatEye
Aliexpress UK
Wireless Transmission Ant+ Bluetooth. Applicable: Cycling Computer, Smart Phone, Cycling Platform, Etc. Ride confidently through rain or shine, knowing that your data collection remains uninterrupted and accurate.
eBay
Bicycle Computer Wired GPS Bike Stopwatch Waterproof Cycling Night Vision Stopwatch Speedometer Odometer Riding Accessories
Aliexpress UK
【Versatile Connectivity】: Bicycle Cadence Detector can seamlessly connect to various devices such as smartphones, bike computers, and smartwatches. 【Waterproof】: This Speed/Cadence Detector designed to withstand tough conditions with waterproof feature.
eBay
WEST BIKING Bicycle Computer Stand Aluminum Alloy Cycling Speedometer Extension Bracket For Garmin/Bryton/Wahoo Bike Accessories
Aliexpress UK
• Accessories included: Main unit, cadence sensor, heart rate sensor with mounting band, USB cable, stem mount, quick start guide, printed user manual (download version).
eBay
Bicycle Computer Holder for Coospo BC200 107 Mount Bracket Road MTB Bike Holder HandlebarsBryton Garmin Edge Cycling Accessories
Aliexpress UK
Selling my Wahoo Elemnt Bolt, incredible cycling computer, works flawlessly and great battery life, only selling due to upgrading to the new model. Comes in original box with mount and unused cable etc Also have Cadence sensor if want for additional £20 Thanks!
eBay
9 Languages GPS Wireless Bike Computer Waterproof Bicycle Speedometer Odometer with Auto Backlight Bracket Cycling Tracker
Aliexpress UK
Polar S-series cadence sensor
eBay
10/20/30cm Bicycle Handlebar Extended Bracket Bike Headlight Mount Bar Computer Holder Lamp Support Rack Alloy Fiber Stand
Aliexpress UK
(Happy Buying Jack :). Genuine, Authentic and Official Goods.
eBay
Rrskit Ultra Light Titanium Alloy Bicycle Computer Stand Suitable For Bryton Rider S Series Bicycle GPS Speedometer Base
Aliexpress UK
Gemini 210 S3+ Bluetooth-compatible ANT+ Speed Cadence Sensor for Garmin Bryton Bicycle Bike Computer. Reinstall battery can switch speed mode to cadence model or cadence mode to speed mode. If the speed and cadence use together,need buy two pieces.
eBay
Aluminum Alloy Bicycle Computer Mount MTB Road Bike Stem Mount Phone Holder Extension Bracket
Aliexpress UK