No C Wire Options
Compare no-C-wire smart thermostats by power method: included adapters and extenders, battery power, and the line-voltage systems to rule out.
Smart WiFi Temperature and Humidity Controller with Timer Outlet Smart WiFi environment control
WiFi Thermostat Fan Coil Thermostat LCD display with temperature, mode, clock
BOSCH BCC50 White Connect to HVAC equipment from anywhere via Wi-Fi
Smart Thermostat Black WiFi connectivity for remote smartphone control