Garmin Swim
TECH SPECS 
SizeUnit dimensions (LxWxD): 23.0”-57.0” x 1.5” x 0.5” (58.0 - 145.0 x 3.8 x 1.2 cm)
Module size: 29.4 x 51.4 x 8.5 mm
ChargingReplaceable battery
BatteryCR2032
Battery life18 months (swimming 3 hours per week)
Water resistance5 ATM
WeightUnit weight: 2.5 oz (72 g)
Module weight: 1.8 oz (51 g)
SensorHeart rate sensor
ConnectivityANT+
Internal storageYes
METRICS 
Heart rateYes
Heart rate variabilityYes
Running metricsNo
Swim statisticsSwim interval heart rate statistics
Other
LINKS 
Affiliate link*Amazon | Garmin
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