Temperature Display Resolution: 0.1°C & 0.1°F Humidity Display Resolution: 1%RH 1. Measurement Range: Indoor Temperature Display Range: -9.9°C to +50°C & 14°F to +122°F Indoor Humidity Display Range: 20%RH to 95%RH Outdoor Temperature Display Range: -40°C to +60°C & -40°F to +140°F Outdoor Humidity Display Range: 20%RH to 95%RH 2. Error: 0°C to 40°C/32°F to 104°F: ±1°C/1.8°F; Other Ranges: ±2°C/3.6°F 40%RH to 80%RH: ±5%RH; Other Ranges: ±8%RH Power Supply: 3 AAA batteries for the main unit; 2 AAA batteries for the transmitter (batteries not included) Due to batch variation, product appearance, color, and printing , but this not affect performance. Color:White Material:ABS Package Contents: 1 * Host 1 * Transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.