VETTA V100A WL2X Wireless Speed and Cadence with Altimeter Cycling Computer Wireless Speed and Cadence with Altimeter Feature Dual Bike Memory and Multiple Freeze Frame Memory Measure current, average and maximum speed and cadence; Also Measure Current/Max Altitude Head Unit can be mounted on the handlebar and stem. Also Twist-Tie Mounting System for Both Sensors Features Low Battery Indicator and (current/Min/Max) Temperature