"These hand held digital thermocouple indicators accept K, T, J, N, E, R and S type thermocouples. Choose between one or two thermocouple inputs. The dual input model allows the user to make two readings which can be viewed alternately or by pressing the differential key a reading can be obtained showing the difference in temperature between the two thermocouples. The case is hi-grade ABS plastic and is supplied with a moulded rubber holster and wrist strap making it ideal for harsh working environments. Other features include peak hold and data hold function keys, timer, selectable between �C and �F. Accuracy: -200�C to 800�C: �0.05% of reading + 2 digits -328�F to 1472�F: �0.05% of reading + 2 digits "