Aube (a Honeywell Company) Programmable Heat Only Thermostat for Floor Heat - 120V  / Double-Pole- 4 Wires.  This thermostat has two modes of operation.  Floor Mode - controls and displays the floor temperature using an external temperature sensor (included).  AF Mode - controls and displays the ambient air temperature and maintains floor temperature within desired limits using external temperature sensor (included).

Features:

• Electronic precision temperature control.
• 7 day programmable - maintain the pre-set program schedule for up to 20% energy savings, or modify the schedule to fit your lifestyle.
• "Early Start" mode can be used to calculate optimal time to start heating in order to obtain the desired temperature by the set time.
• Large, clear, backlit display - easy to read in various lighting conditions. 
• Soundproofed for quiet operation - reduces the clicking noise commonly heard with conventional thermostats.
• Heating indicator - at a glance confirmation that the heat is on.
• On/Standby switch allows you to turn the thermostat off at the end of the heating season.
• Includes Built-In GFCI
• Includes floor sensor with 15 foot cord
• Maintenance free - no batteries required.
• 3-year limited warranty.

Specifications:

Description  Line Volt Electric Heating (Ambient and Floor) Manual Thermostat with 15 mA Class A EGFPD
Application  Radiant floor
Mounting  Vertical
Color  White
Power Method  Hardwired
Electrical Connections  6 in. (150 mm) tinned copper lead wires
Switch Positions (System)  °C/°F
Switch Positions (System)  AF (ambient+floor)/ F (floor only)
Switch Type  Epoxy-soundproofed relay
Switching Action  DPST
Accuracy (F)  0.9 F
Dimensions (in.)  4.9 in X 2.8 in X 0.9 in
Setting Temperature Range (F)  40 F to 86 F ambient
Setting Temperature Range (F)  40 F to 104 F floor
Differential Temperature (F)  1 F
Electrical Ratings  Max. 1800 W @ 120 VAC, 15 A
Frequency  50 Hz
Frequency  60 Hz
Cycles per Hour  4
Sensor Element  Thermistor
LEDs  On EGFPD test button
Minimum Temperature Setting (F)  40 F (floor & ambient)
Maximum Temperature Setting (F)  86 F ambient
Maximum Temperature Setting (F)  104 F floor
Ambient Temperature Range (F)  AF mode: 32 F to 122 F
Ambient Temperature Range (F)  F mode: 32 F to 140 F
Approvals, Canadian Standards Association  Approved
Includes  Aube AC112-01 North American Sensor, 15 feet (4.6 m) or 50 feet (15 m)
Voltage  120 Vac