Wide Usage: They can be used to measure temperature of liquid, vapor and solid object such as fish tank, swimming pool, kiln, ceramics, pottery, molten metal and so on (accuracy: +/-0.1% + 0.6ºC). Multifunction: can measure the temperature of two objects simultaneously with 2 modes (T1/T2, t1-t2) and maximum (max), minimum (min) and medium temperature. Wide measuring range: batch: -210ºC to 200ºC (-346°F to 2192°F), K: -200ºcto 1372ºc (-328°F to 2501°F), T-type: -250ºC to 400ºC (-418°F to752°F), E-Type: -150ºC to 1000ºC (-238°F to1832°F), N-Type: -200ºC to 1300ºC (-328°F to2372°F), r-and-s type: 0ºC to 1767ºC (32°F to 3212°F) Package: Comes with 3*AAA batteries and two K thermocouples (also support other thermocouples of J/T/E/R/s/ N types). Practical design - Large LCD display with backlight; automatic shutdown; hold function data.