Measuring elements Optical tachometry : optical detection (Phototransistor tip length 40 cm max.) Contact tachometry : ETC adaptor for optical tachometry probe. Display 2 lines, LCD technology. Sizes 50 x 34.9 mm. 1 line of 5 digits with 7 segments (value) 1 line of 5 digits with 16 segments (unit) Housing Shock-proof made of ABS, IP54 protection Keypad Metal-coated with 5 keys Cable retractable, length 450 mm, up to 2.4 m when released Conformity electro magnetical compatibility (NF EN 61326-1 guideline) Power supply 1 alcaline battery 9V 6LR61 Operating temperature from 0 to 50°C Storage temperature from -20 to +80°C Auto shut-off adjustable from 0 to 120 min Weight 190g Languages French, english