Bicycle wireless Bluetooth speedometer Magne S3 + speed/cadence sensor ANT

Brand Name: Magene
Origin: CN(Origin)
Stopwatch and Accessories: Wireless Stopwatch
Model Number: S3+
Size: 8.85*29.8*38.3mm
Data: Speed/Cadence
Weight: 9g(with battery)
Working Temperature: -20-50℃
Sensor: Geomagnetic sensor