Bluetooth-compatible speed and cadence sensor for cycle computers. Operation confirmed. □ Manufacturer: LEZYNE □ Model: PRO SENSOR PAIR Pair set of Pro Speed Sensor (hub mount) and Pro Cadence Sensor (crank arm mount) □ Color: BLACK □ Weight: 11g each □ External dimensions: 37 x 33 x 13 mm each □ Battery: CR2032 button battery X1 Ultra-compact and lightweight, cycling speed sensor that doesn't require magnets. Semi-transparent composite matrix construction with LED indicator. Equipped with a high-tech dual Bluetooth system that can be paired with cycle computers and smart trainers simultaneously. Uses CR2032 button batteries.