M5.16 type used for electric floor heating, like electric heating cable, electric heating film, electric heating mat and other electric heaters. M5.16D type also used for electric floor heating, like electric heating cable, electric heating film, electric heating mat and other electric heaters. It have both outside sensor and inside sensor:the inside sensor can detect the room temperature and control by the set temperture; the outside sensor can detect the ground temperature, it will stop heating when the ground temperature reach about 35℃. M5.03I and M5.03 type used for water heating, like electric valve and water heating actuator.They only have built-in sensor and no outside sensor。 Certification : CE Certification : RoHS Origin : CN(Origin) Model Number : M5.16 (16A) / M5.16D (16A) M5.03 (3A) / M5.03I(3A) Color : White Material : Anti-flammable PC Working Voltage : AC220~240V 50/60Hz Application : 16A for electric heating floor 3A for water heating floor Programmable : No Electric Heating Package includes: 1 x room thermostat 2 x screws 1 x 3m external sensor (for external probe) 1 x user manual Electric Heating Sensor Package includes: 1 x room thermostat 2 x screws 1 x 3m external sensor (for external probe) 1 x user manual Water Heating Package includes: 1 x room thermostat 2 x screws 1 x user manual Water Heating Sensor Package includes: 1 x room thermostat 2 x screws 1 x 3m external sensor (for external probe) 1 x user manual