The Strada Digital Wireless combines all the cycling functionality of the popular Strada Wireless computer plus the digital heart rate & cadence measurements. Using the latest 2.4 G Hz digital wireless speed, heart rate & cadence sensors (ISC-10 & HR-10), the Strada Digital Wireless RD430 is now virtually interference free & features automatic sensor recognition so you can track all your rides no matter which bike you choose. The all-new detachable fabric HR sensor is designed to be more comfortable than tradition chest straps. Along with the standard cycling functions, the Strada Digital Wireless features a low battery alarm for both the computer head & sensor. Current speed: 0.0 (4.0) ~105.9 km/h [0.0 (3.0) ~65.9 mph] Elapsed time: 0:00'00"~9:59'59" Heart rate: 0 (30)~199 bpm Cadence : 0 (20)~199 rpm Trip distance 1: 0.0~999.99km [mile] Trip distance 2: 0.00 ~9999.9 km [mile] Average speed: 0.0 ~105.9 km/h [ 0.0〜65.9 mph ] Maximum speed: 0.0 (4.0) ~105.9 km/h [0.0 (3.0) ~65.9 mph] Total distance (Odometer): 0~99999km [mile] Clock: 0:00'~23:59' Pace arrow: Yes Auto power saving: Yes Sleep mode: Yes Auto start/stop: Yes Dual tire size: Yes Odometer manual set: Yes Tire size: 0100cm~3999cm (default:2096mm) Battery: Lithium battery CR2032X1 Battery life: Computer: approx 6 months (1hr use per day, may vary depending on environment.) Heart rate sensor: approx 1 year (1hr use per day, may vary depending on environment.) Speed sensor: approx 1 year (1hr use per day, may vary depending on environment.) Dimension / Weight: Computer:46.5x31.0x16.0mm / 20.3 grams Heart rate sensor:31.0x62.5x13.2mm / 15.4 grams Speed sensor:47.4x62.4x13.1mm / 21 grams