Soxai has launched the Ring 2 smart ring in Japan with a slimmer 6.7 mm design, a new Deep Sensing PPG sensor, and up to 14 days of battery life. The ring focuses on sleep tracking and health insights, with no subscription fee.
Japanese startup Soxai has officially launched the Soxai Ring 2. This smart ring joins a growing lineup of scaled-down health-focused wearables from companies like Oura and Samsung. It is being marketed with features like sleep monitoring and long-term health tracking, following a refresh of both its hardware and sensing system over its predecessor.
The Ring 2 is built around a redesigned optical PPG sensor branded "Deep Sensing," which Soxai says was developed in-house using its own optical and algorithmic know-how. The updated sensor is intended to improve measurement accuracy for heart rate, blood oxygen levels, sleep stages, and indicators linked to sleep apnea risk. Alongside the PPG sensor, the ring also uses an AI-assisted 3D accelerometer and a skin temperature sensor.
Physically, the Soxai Ring 2 is slimmer than the previous model. The ring measures 6.7 mm in width and 2.7 mm in thickness. Weight ranges between 2.1 g and 2.7 g depending on size. The outer shell is made from titanium alloy, while the inner section uses synthetic resin. Soxai offers the ring in five finishes: silver, matte silver, matte black, pink gold, and gold.