This product is either discontinued or we cannot get that from suppliers.
Garmin 010-12342-00 HRM-Swim, Color: Blue, Module size: 29.4 x 51.4 x 8.5 mm, Module weight: 1.8 oz (51 g), Size adjustment: Bi-fold, Sizing range: 23.0"-57.0" (58.0 - 145.0 cm), Battery: CR2032, Battery life: 18 months (swimming 3 hours per week), Water rating: 5 ATM.
Take your training to the next level by pairing HRM-Swim with your Forerunner 920XT. The sleek, non-slip strap stays in place, even during wall push-offs. Once out of water, real-time heart rate, interval summaries and stored heart rate are transmitted to the 920XT.