The CatEye™ Q3a Cycling Computer has a heart-rate monitor, an altimeter to measure altitude and is even waterproof to track your swimming.

• Q3 multi-sport computer watch.
    - Heart-rate monitor, altimeter and other cycling functions.
    - 5 programmable heart-rate zones.
    - Can display 99 laps with real-time function.
    - Programmable countdown functions.
    - 2.4GHz wireless band can store up to 30 training files.
• 3 different display areas for stats:
    - Upper level: displays current, average or maximum speed. Average and maximum lap speed. Sea level and ascending altitude.
    - Middle level: current, average or maximum heart rate and current, average and maximum cadence. Maximum and average lap cadence. Average and maximum lap heart rate. Temperature, slope angle and laps.
    - Lower level: date, clock, calorie consumption, total time, trip distance, countdown distance, laps, split time, lap timer, countdown timer, interval timer and recovery time.  
• Can transmit up to 5 meters (depending on weather or environment).
• Temperature range: 0-40C (LCD may turn black if it is outside of this range.
• Tire size: 1 size for each sensor ID.
• Wristwatch: Battery- CR2430 x 1.
    - Battery life: approximately 1 year (1 hour of use per day).
    - Measures: 55 x 46.5 x 15 mm.
    - Weight: 36 grams.
• Speed sensor: Battery- CR2032 x 1.
    - Battery life: approximately 1 year (1 hour of use per day).
    - Measures: 65 x 90.5 x 14.4 mm.
    - Weight: 36 grams.
• Heart-rate sensor: Battery- CR2032 x 1.
    - Battery life: approximately 1 year (1 hour of use per day).
    - Measures: 325 x 31.4 x 12.2 mm.
    - Weight: 40 grams.
• Waterproof up to 30m.
ù All displays have ranges.
• Imported.