Siemens RDD100.1RFS, S55770-ST281 Wireless room thermostat with LCD, including receiver Battery-powered DC 3V thermostat with mains-powered AC 230 V receiver, no time switch

Siemens RDD100.1DHW, S55770-T277 Has Been Replaced By RDE100.1DHW  Room thermostat with LCD, battery, independent DHW 2-position control with on / off positioning signal output f

Siemens RDD100, S55770-T275 Room thermostat with LCD, AC 230 V 2-position control with on / off positioning signal output for heating Op

Siemens RDD100.1RF, S55770-T319 Wireless room thermostat with LCD Battery-powered DC 3 V thermostat, no time switch

Siemens RDD310/EH, S55770-T296 Can Be Replaced By RDE410/EH Flush-mount room thermostat