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. CHPRSTATDPRF - Wireless Programmable Thermostat with Digital Display Wireless Communication Between Thermostat and Receiver 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 Battery Powered with Low Indication Status (Batteries Supplied) Summer/Winter Time Change 5°C to 35°C Set Temperature Range 0.5°C and 1°C Temperature Swing Adjustment 5°C Frost Protection Transmission frequency: 868Mhz (80m Open Field, 30m Indoor Transmission) Receiver 16A Switch Rating 240vAC Energy efficiency; ERP Class 4, 2% value Modes: Permanent, Timed and Temporary Override Ingress Protection: IP30 Operating Temperature: 0°C to 50° Material: ABS Dimensions: 140mm x 88.6mm x 32.1mm