Drive Medical O2 Analyzer with 3 Digit LCD Display

3-digit LCD display Extended battery life Ultra light weight & stable Maintenance free Easy calibration Auto off Overall Product Length: 3" Overall Product Height: 3" Primary Product Material: Plastic Primary Product Color: White Batteries: 1 3v 0.55ah Operating Temperature: 60 To 104 Deg F Actual Product Weight: 0.5 Lbs Overall Product Width: 3"