general tstd-a230-100 series thermostats can be extensively applied for light industrial, commercial and residential environment and they can control most of heating, cooling and ventilating equipment with auto/manual fan speed settable. they are flush-mounting models for easy installation into 86 junction box. the set-point range of the thermostat can be freely set between 5 and 95¡æ. the thermostat is powered by ac230v with built-in rs485 network protocol. the thermostat can be set at 12/24 time mode and can display celsius and fahrenheit temperature mode. features ¡ñ 5+2/7-day programmable or nonprogrammable ¡ñ built-in rs485 communicating protocol ¡ñ celsius and fahrenheit switchable ¡ñ 12/24 time mode selectable ¡ñ internal/external sensor exchangeable ¡ñ auto/manual fan speed programmable ¡ñ setpoint range settable (5¡æ to 95¡æ) ¡ñ low temperature protection ¡ñ remote control (optional) ¡ñ sleep function ¡ñ blue/green backlight (optional) ¡ñ fan mode selectable