UMLIFE 2PCS Temperature Controller Module with Case, XH W1209 LED Display Dig…
P0 :Cooling / Heating; Range: C/H; Default: C. P4 :Temperature Correction; Range:-7~7℃; Default: 0℃. P6: High Temperature Alarm; Range:0-110; Default: Off. You need to tear the wood outside layer off carefully, the outside layer is very thin.