Scosche RHYTHM24Wahoo TickrX
TECH SPECS 
SizeWorn on the upper or lower arm. Adjustable straps. One size fits all.(LxWxH): 2.75" x .5" x 1.5"
Strap Length: Adjustable from 23" to 48" (stretched)
ChargingUSBReplaceable battery
BatteryLithiumCR2032
Battery lifeup to 24 hoursup to 12 months
Water resistanceIP68 (can be submerged up to 1 meter)IPX7 (waterproof up to 5 ft)
Weight8.5 grams (without strap)
SensorValencell optical heart rate sensor, NFC A-TagHeart rate sensor, accelerometer
ConnectivityBluetooth (100 ft range), dual-mode radio that can simultaneously transmit your heart rate to multiple ANT+ displaysBluetooth 4.0 and ANT+ dual-band technology
Internal storageYesYes. Up to 16 hours of workout data.
METRICS 
Heart rateYesYes
Heart rate variabilityYesYes
Running metricsReal-time heart rate data, run pace, run cadence, calorie burn, vertical oscillation and ground contact time
Swim statisticsNoSwim interval heart rate statistics
Other- Works with many fitness apps.
- LED’s can also be used to show HR zones
- five training modes and two multi-modes to choose from
- heart rate variability (HRV) mode that monitors the time between each heartbeat for stress and recovery tracking
- Works with apps like RunFit, 7 Minute Workout and more.
- Captures your indoor cycling cadence when paired with the Wahoo Fitness App.
LINKS 
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