Ranges: temperature -10 to +50°C (internal), -50 to +70°C (external probe) x 0.1°C, humidity 20 to 99% R.H. (internal) x 1% R.H. With twin line display of unit temperature, unit humidity or probe temperature and clock. The attached probe with 2m cable allows remote monitoring of a refrigerator, freezer or outdoor temperature with Max./Min. function. Supplied with wall hanger, folding table stand, 1.5V AAA battery and manufacturer’s certificate of calibration (two point - thermometer only) traceable to national and international standards, including NPL and NIST. Overall H x W x D (unit) 103 x 98 x 21mm, weight 121g.