Feature:1. [Central AC Thermostat] This central air conditioning thermostat adopts LED panel, allowing for energy saving control, with 485 interface, supporting RTU protocol.2. [User Friendly Control] The thermostat combines colorful lighted temperature control knob and large touch keys, making it easier to operate.3. [Thin Control Panel] This wall mounted temperature controller is thin, with a thickness of 12.4mm; Multiple installation positions for easier integration into scenes.4. [Cool Lighting Effect] The knob features 8 lighting effects, 7 color lights transition with Xmas light mode, adding a cool visual effect to your home.5. [Versatile Installation] This smart air conditioner thermostat supports 86x86 square or 60mm round box installation, suitable for most installation environments.Specification:Item Type: WiFi Air Conditioner ThermostatEnclosure Material: PC, ABS (Fireproof)Model: BAC-009ELWPower Supply: 24V DC/AC 50-60HzFan Relay Ampere Resistor: 5A; Inductance: 3AValve Relay Ampere Resistor: 3A; Inductance: 1ASensor: Negative Temperature Coefficient 3950, 10KSetting Temperature Range: 5-35Accuracy: 1Display Temperature Range: 5-99Ambient Temperature: 0-45Ambient Humidity: 5-95% RH (Non Condensing)Storage Temperature: -5-45, Timing Error: <1%Power Consumption: <1.5WMounting Box: 86 x 86mm Square or 60mm Round BoxWire Terminal: Wire 2 x 1.5mm or 1 x 2.5mmIP Rating: IP20Button: Capacitive Touch ButtonWiFi: 2.4G WiFi.Package List:1 x WiFi Air Conditioner ThermostatNote:The product is only suitable for 4 pipe air conditioner.