CatEye V3 is the most elegant powerful and reliable training partner you can ride with.  The latest 2.4GHz digital data transmission virtually eliminates interference and cross-talk, while the large screen simultaneously displays speed, cadence, heart rate and time information. The FlexTight bracket fits almost all Stems and Handlebar.
Functions

• Current speed, cadence, heart rate
• Average speed, cadence, heart rate
• Maximum speed, cadence, heart rate
• Calorie consumption
• Countdown distance
• Timer
• Lap time, distance, average speed, number
• Odometer
• Total time, clock and date

Features

• Automatic 2nd bike sensor recognition
• Interference/Cross-talk free 2.4GHz digital wireless technology (ID coded)
• Wireless measurement of speed, cadence and heart rate
• EL backlight
• Tool free integrated cadence/speed sensor
• 3 lines, 4 read outs
• FlexTight™ Bracket
• Programmable odometer
• 14 files, 99 lap recording
• File data review
• Auto or manual start/stop
• Pace arrow speed and heart rate  

Specifications

• Fits almost any handlebar or stem: 22-31.8mm
• Fits almost any fork: 11-55mm
• Batteries CR2032 x 2 (1 each for head unit and sensor)