2 products were found matching your search for hrv in 2 shops:

Stay connected to your wellness with the BOYACARE Smart Ring, a sleek fitness and health tracker designed for all-day and overnight comfort. Track heart rate, blood oxygen, HRV, body temperature, sleep, activity, and menstrual cycle reminders through the companion app. A built-in vibration motor provides gentle alarm alerts and discreet call notifications right on your finger, perfect for meetings, workouts, or quiet moments.Automatic sleep tracking records fall-asleep and wake times, plus light and deep sleep stages, with daily, weekly, and monthly app reports. The ring also tracks steps, calories burned, distance, walking, running, and cycling. Charge fully in about 1.5 hours for up to 6 days of use; the magnetic case provides about 15 additional charges. Enjoy lifetime app access with no subscription fees on iOS and Android. With 5ATM waterproof protection, it is suitable for swimming, showering, workouts, and daily wear. BOYACARE recommends using its Sizing Kit before purchase for the best fit.

Up for sale is my circa 2010-ish Rat Electronics Hot Rod Valve Special (HRVS), a small-batch, hand-wired boutique tube amplifier in good cosmetic c...