Sangamo are a UK manufacturer of time clocks/heating controls, thermostats, immersion controllers & programmers. The brand is also recognised for their Round Pattern Time Switches. CHPRSTATDP - Electronic Programmable Room Thermostat  24 or 7 Day Programmable 6 Time/Temperature Events per Day Permanent, Timed and Temporary Override Features Pre- Programmed Schedule Ready for Use Electronic Sensor for Accurate and Responsive Performance TPI (Time Proportional & Integral) Control for Heating Efficiency Optimum Start/ Delay Start and Optimum Stop for Additional Efficiency Summer/Winter Time Change 5°C to 35°C Set Temperature Range 0.5°C and 1°C Temperature Swing Adjustment Frost Protection 3A Contact Rating (Volt Free) Modes: Permanent, Times and Temporary Override Operating Temperature: 0°C to 50°C Material: ABS Dimensions: 140mm x 88.6mm x 32.1mm