Caution: color: we shlp according to the color of the first picture, in the package: if the quantity is not stated in the description, we will shlp the item according to the quantity and model in the title. Tenmars tm-747d 4-channel thermometer seven thermocouple type selections:k,j,t,e,r,s,n,usb pc serial interface:windows xp /7~10 the product is shlpped based on the color or size of the main image of the product page. Tm-747d 4-channel thermometer-seven thermocouple type selections: k,j,t,e,r,s,n-datalogging capacity 16,800 records.-Relative rel measurement-selectable c/f/k units-dimension:168x73x35mm lxwxh -weight:approx. 330G-max /min /avg /time and data hold functions-dual lcd displays t1-t2 and t3-t4.-Hi/lo audible alarm functions-usb pc serial interface:windows xp /7~10.Specification range type-k: -200to +1372-328Hto +2501H type-j:-210to +1200-346Hto +2192H type-t:-250to +400-418Hto +752H type-e:-210to +1000-346Hto+1832H type-r / s:0to+1767+32Hto+3212H type-n:-150to+1300-238Hto+2372H resolution 0.1 K / j / t / e / n1000 1 r / s and k / j / t / e / n1000 accuracy k/j/e/t/n type: 0.05% Rdg + 0.7C / 1f 0.05% Rdg + 0.7C / 1f below-100 c -148 f : k, j, t, e + 0.15% Reading. N + 0.45% Reading r/s type: 0.05% Rdg + 3c / 5.4F temperature coefficient 0.05%0.07C of reading/c 0.06F/f outside +18c to28c +64 fto +82f specified range temperature scale its-90 the above specifications do not include accuracy of thermocouple.