Renpho LYNX Smart Ring
Monitor your essential health statistics
The ring uses multiple sensors to measure activity, steps, sleep, stress, and blood oxygen.
£219.99 FROM renpho.uk FEATURES Heart rate and blood oxygen monitoring, step counter, sleep tracking, stress monitoring; up to 7 days’ battery life (14 days with USB charging case); Apple Health integration; waterproof to 5 ATM
The ring has an impressive battery life of seven days, with up to a further seven in the case