BT-1 Big screen Indoor/outdoor thermometer
Function and features:
Display Indoor and outdoor temperature simultaneously
Switch between /F
Max./Min. temperature value memory
Max./Min. temperature value recovery function
Technical parameters:
Measuring range: Indoor temperature -30+50(-22F122F)
Outdoor temperature -5070(-58F158F)
Resolution:0.1
Power supply: one 7# Alkaline battery
Instruction:
Display current temperature value when install the battery.
Min Key: press it then display the Min. memory value
Max key: press it then display the Max. memory value
Reset key: under Min/Max. modes, press "Reset" then the former memory value returns to the current value.
/F: under mode to display Celsius; under F mode to display Fahrenheit

Product size: 111×101×21.5mm
Screen size: 81.5×64.5mm

BT-2 (indoor/outdoor)  thermo hygrometer
Features:
Measure and display the indoor/outdoor temperature and indoor humidity
Automatically memorize the Max./Min. values of the indoor/ outdoor temperature and indoor humidity
Switch between /
Clock function and alarming function
12/24 hour mode switch
8 minutes snooze function
Recovery function on the Max./Min. values
Technical parameters:
Indoor temperature measuring range: -30+50(-22122)
Outdoor temperature measuring range: -50+70(-58158)
Indoor humidity measuring range: 20%99% (Relative humidity)
Resolution: Temperature:0.1; Humidity: 1% RH
Power supply: one 7# alkaline battery
Operation environment: Temperature:050; Humidity: 5%85% RH

Product size: 111×101×21.5mm
Screen size: 81.5×64.5mm