https://www.sentiotec.com/en/categories/harvia-austria-infra/steuerungen/is1_is2_master

IS1 Professional infrared – single-component basic infrared control units.

Innovative technology IS1:

Professional, basic infrared control at a low price
Mains connection cable 16 A, 230 V
Single-circuit infrared control unit with temperature control
One heating output max. 3000 W
Optional interior temperature control for radiators or heating foils
Foil temperature monitoring
Switching cabin lighting on/off
Optional: Safety temperature limiter