DUAL BAND TECHNOLOGY - ANT and Bluetooth Smart capabilities allow for a wireless connection to both smartphones and bike computers. WIRELESS CONNECTION - No tangled wires on your bike to connect the sensor to your device. MAGNETLESS - The RPM Speed and Cadence installs easily with no magnets required SLEEK, LIGHTWEIGHT DESIGN- weighs 7 grams for each sensor (excluding mount) SPEED MEASUREMENT - Speed sensor provides accurate speed data during your ride CADENCE MEASUREMENT - Cadence sensor provides accurate speed data during your ride HUB MOUNT (SPEED)- Speed sensor mount on any front wheel hub with a secure silicon casing TWO BIKE MOUNT OPTIONS (CADENCE) -with double sided 3M tape, or using the silicone sleeve and mount with zip ties. VISIBLE CONNECTION- Two LED lights show the sensor's device connection (blue) and speed detection (red) REPLACEABLE BATTERY- No charging required! Operates on a coin cell battery for up to 1 year UNIVERSAL FIT -RPM Speed & Cadence will fit with most bikes and frame sizes