Coospo Bk467 Speed Sensor Dual Mode RPM Monitor Bluetooth Ant+ for Wahoo Garmin
£13.69
You can swtich the mode between speed and cadence. Just simply reset the battery, blue light indicates cadence mode and red light inditates speed mode. Using with a replaceable coin cell battery( CR2032), BK467 can last up to 500 hours of ride.
