MC40:

Range of measurement:
Temperature: -4℉~158℉ (-20℃~70℃)
Humidity: 10% to 99%RH

Resolution:
Temperature resolution: 0.1℃/0.1℉
Humidity resolution: 1%RH

Degree of accuracy:
Temperature accuracy :±1℃ (±1.8℉)
Humidity accuracy: ±5%RH (30%-70%)
Product size: 80mm*59mm*23mm (length * width * height)
Battery type: 1.5VAAA*2(not included)
Thermometer products are delivered with retail box

【Air Comfort Indicator】Humidity meter with humidity level icon indicates air condition, allowing this humidity sensor to ensure you’re always aware of changes to your home/household with just a quick glance,help to adjust the humidifier, dehumidifier settings and humidistat.
【Pocket Size & Big Numbers】The digital thermometer for room temperature a compact and lightweight design, so you can easily put it in your pocket and it will be great for space-saving when placing it at your desktop or nightstand. Also, with a large screen and big numbers, this thermometer lets you easily read the current temperature and humidity.
【Healthier Home & Environment】Thermometer hygrometer with temperature and humidity monitor ensures proper indoor humidity control has important skin, and health benefits; Can also be as refrigerator thermometer, freezer thermometer, reptile thermometer, soil thermometer, humidor hygrometer, cigar hygrometer and more.
【Multiple Mounting Options】There are three mount methods for indoor thermometers, such as Magnet attachment, table stand and wall mount, put anywhere you want; °F/°C Selector are on the back; Powered by 2 x AAA battery (not included, the battery slot is on the back, and you need to slide the magnet cover to put the battery in.)

MC41:

Range of measurement:
Temperature: -4℉~158℉ (-20℃~70℃)
Humidity: 10% to 99%RH

Resolution:
Temperature resolution: 0.1℃/0.1℉
Humidity resolution: 1%RH

Degree of accuracy:
Temperature accuracy :±1℃ (±1.8℉)
Humidity accuracy: ±5%RH (30%-70%)
Product size: 80mm*59mm*23mm (length * width * height)
Battery type: 1.5VAAA*2(not included)
Thermometer products are delivered with retail box

【Air Comfort Indicator】Humidity meter with humidity level icon indicates air condition, allowing this humidity sensor to ensure you’re always aware of changes to your home/household with just a quick glance,help to adjust the humidifier, dehumidifier settings and humidistat.
【Pocket Size & Big Numbers】The digital thermometer for room temperature a compact and lightweight design, so you can easily put it in your pocket and it will be great for space-saving when placing it at your desktop or nightstand. Also, with a large screen and big numbers, this thermometer lets you easily read the current temperature and humidity.
【Healthier Home & Environment】Thermometer hygrometer with temperature and humidity monitor ensures proper indoor humidity control has important skin, and health benefits; Can also be as refrigerator thermometer, freezer thermometer, reptile thermometer, soil thermometer, humidor hygrometer, cigar hygrometer and more.
【Multiple Mounting Options】There are three mount methods for indoor thermometers, such as Magnet attachment, table stand and wall mount, put anywhere you want; °F/°C Selector are on the back; Powered by 2 x AAA battery (not included, the battery slot is on the back, and you need to slide the magnet cover to put the battery in.)