This device replaces the same device with two external probes that broke down first bizarrement.Tout external probe offl shown and a few days after further communication with the second probe which nevertheless locally gives good values as well the receiver? Planned obsolescence is this ?? I hope not because this time I have 4 probes extérieures.Quant operation unrelated to the ancien.Enregistrement on the computer (XP or 7) no problem and the software allows graphics and communicates by wireless USB key provided with the summary récepteur.En very happy with my purchase the future will he confirm me? .The order, the delivery, the packaging everything was perfect