The RuuviTag 4‑in‑1 (MPN RT4in1, SKU WLONONWCRCSK1, EAN 705632602119) is a compact Bluetooth Low Energy environmental sensor, which measures:

• Temperature
• Relative humidity
• Atmospheric pressure
• Movement/acceleration (motion meter)

It has an IP67 rating for protection against splashes and dust, uses a rechargeable CR2477 battery (included), and offers a typical battery life of 12–24 months depending on reporting interval and configuration. The sensor's key performance includes:

• Temperature accuracy ±0.2 °C (5–60 °C)
• Humidity accuracy ±3 %RH (20–80 %RH)
• Pressure accuracy ±1 hPa

Connectivity and integrations include BLE, Ruuvi Station (iOS/Android), Ruuvi Gateway/Cloud for remote reporting, as well as compatibility with Victron Energy GX and VRM devices. There is also an open firmware ecosystem and numerous third-party integrations (Home Assistant, Homey, etc.).