Star Ring Series Smart Knob Thermostat (GA / GB / GC) — Water, Electric & Boiler Heating, Easy to Install

Overview: A Star Ring Series smart knob thermostat that brings intelligent temperature control and home linkage to water, electric, or boiler heating systems. Choose the correct model for your installation: GA for water heating, GB for electric heating, or GC for boiler systems. Display & lighting: The standby screen brightness is adjustable from 0-100% either on the APP or directly on the device. The thermostat includes an ambient backlight effect and the ambient light can be switched on or off. Safety features: A child lock can be enabled through the APP to prevent accidental operation by children and avoid potential hazards or wasted energy. Smart home linkage & energy saving: The thermostat supports sensor-based linkage—when a human-body sensor detects that a room has been vacated, the smart temperature control and linked smart lights will automatically turn off. Activating Energy-Saving Mode adjusts the heating to the energy-saving temperature you set in the APP. According to statistics, this can reduce your electricity bill by up to 20%.