This speed and cadence sensor gets its name from reading the two at once, Topeak's DuoBand takes on a duo of equations and transmits them to your ANT+ bluetooth compatible bike computer. For an integrated look, the DuoBand has a low profile and an adjustable angle. The DuoBand's transmissions range within 5 meters, the DuoBand also has a waterproof rating of IPX7, and comes with a CR2032 battery.
Tech: Bluetooth® Smart & ANT+ super low energy technology
Battery: CR2032 x 1 (included)
Battery Life: ~900 hr
Transmission range: < 5 meter (16.4 ft)
Water resistance: IPX 7
Feedback: Power / low battery indicator / speed sensor sensing indicator light
Size: 6.5 x 2.9 x 1.7 cm / 2.6” x1.1” x 0.7”