Smart Plug- WiFi 2.4GHZ only, it supports DS18B20 probe with audio plug - RS485 probe with audio plug. Specifications Material: Flame retardant ABS material + polycarbonate WiFi Connection: Support WiFi 2.4GHz(1-13 channel) Mobile network: Support single Nano - SIM card Network Support: Supports GPRS, 4g * System Support: Android 8.1 / iOS 11 + Working Voltage: 240V Maximum Power: 3.5KW MAX Maximum Current: 16A MAX Operating Temperature: -10~60℃ Dimensions: 64×117×35mm