SPEED MODE Attach the silicone pad onto the back of the sensor, then strap the sensor with the long rubber band onto the front wheel axle. MODE Attach the silicone pad onto the back of thesensor, then strap the sensor with the short rubber band onto the left pedal crankarm. Note: It is necessary to confirm whether the between the crank and the frame meets the installation requirements before installation. Installation Note: The rubber bands and silicone pad can be according to the actual situation. Model: Battery: CR2032 Battery life:300h in speed mode,280h incadence mode Waterproof grade: IPX7 Workingtemperature:-20~50 Wireless: ANT+, Bluetooth Color: Black Material: plastic Package Contents: 1 x Bicycle Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.