Model: 20648 - Quantity: 1 - Color: Blue - Material: Plastic - Time / alarm clock function - Temperature measuring range: Indoor: 0~50'C (32~120'F); Outdoor: -20~70'C(-4~158'F) - Temperature accuracy: +/- 1.0'C (1.8'F) - Temperature resolution: 0.1'C (0.1'F) - Humidity measuring range: 30%RH~90%RH - Humidity accuracy: +/-5% (40%~80%) other: +/-8% - 'C and 'F temperature switch function - Max / Mini temperature and humidity memory function - 12/24 hours system clock - Automatic examine the sensor mistake and when the measuring value is over the range error symbol display: --.-'C or --% - Package includes: - 1 x Digital thermometer - 1 x Temperature sensor - 1 x AAA battery - 1 x English user manual