ITEM NAME:HC520 Digital In-Outdoor Thermometer Hygrometer Temperature Humidity Measurement HC520 Digital Indoor/Outdoor Thermometer Hygrometer Temperature Humidity Meter LCD Weather Station With Sensor Features: Indoor and outdoor temperature measuring Display temperature and humidity simultaneously MIN and MAX value recording Confortable degree symbol Low power consumption High stability & accuracy Memory of last measuring value Desk-top placing or wall hanging Specification: Temperature range: In side temperature: -10~+50Â °C (+14~+122Â °F) Out side temperature: -50~+70Â °C(-58~+158Â °F) Humidity range: 20%~90%RH Temperature resolution: 0.1Â °C(0.1Â °F) Humidity resolution: 1% RH Temperature accuracy: Â ±0.1Â °C (-20~60Â °C), Â ±2Â °C (other) Humidity accuracy: Â ±5%RH (20%~99%, at 25Â °C) Battery:2x 1.5 Volt AAA (not included) Storage.Display temperature and humidity simultaneously. Humidity range: 20%~90%RH. Humidity resolution: 1% RH. Humidity accuracy: Â ±5%RH (20%~99%, at 25Â °C). Also note that monitor settings may vary from computer to computer and may distort actual colors.