W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Cool Temp Control Module Switch with 10A One-Channel Relay and Waterproof with LED Display sold2024 ]（With 5V / 12V /

]（With 5V / 12V / 24 to Choose from

Compatibility: fit for Zebra Z4000 Z4M Z4Mplus S4M label printer

the RED light on

input the output end of the second module of the first module

W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat -50-110°C Electronic Temperature Cool Temp Control Module Switch with 10A One-Channel Relay and Waterproof with LED Display sold2024 ]（With 5V / 12V /W1209 12V DC Digital Temperature Controller Board Micro Digital Thermostat 50 110C Electronic Temperature Cool Temp Control Module Switch with 10A One Channel Relay and Waterproof with LED Display Product Features Temperature range : 50 110 C. Static current: 35MA, attract current 65MA. Environmental requirements: 10 ~ 60 C ,Humidity 20% 85%. Relay output interface is a switch, when it working ,these two ports are connected. Resolution: When