ri-former® extension module ri-thermo® NDigital display for optimum readability of the measurement values in C or in F Memory function for 12 measurements Probe covers: A new probe cover should be used for every measurement in the ear for reasons of hygiene and accuracy. No measurement should be made without a probe cover! Two alkaline manganese batteries type AA 1. 5 V included for approx. 1, 000 measurements. Supplied with 25 probe covers in attractive sales packaging