Temperature range -10°C to +55°C. Humidity range 20%RH to 99%RH. Accuracy °C ~ 50°C ±1°C otherwise ±2°C. ±8%RH (40%RH ~ 80%RH). Resolution: Temperature :0.1°C. Humidity 1%. Battery 1 x AAA battery (not included). Dimension 75x60x23mm. Probe wire length 2.9m. Ambient temperature -10°C to +50°C / +14°F to 122°F.