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**Technical Specifications:** * **CPU:** ESP32 * **Flash Memory:** 4 MB * **Power Supply:** 8-24 VAC / 9-28 VDC / 5 VDC (stabilized via +5 VDC and GND) * **Power Consumption:** < 1W * **Digital Input Resistance:** 50 kΩ * **Digital Input Activation Voltage:** 1.5V (low active level) * **Maximum Switching Voltage:** 30 volts * **Maximum Switching Current:** 250 mA * **Voltage Meter:** 0-15 VCC / 0-30 VCC (two ranges) * **Impulse Counter Input Activation Voltage:** 1.5V (low active level) * **Maximum Pulse Counter Frequency:** 1kHz * **Compatible External Sensors:** Single DHT22 or up to five DS18B20 * **Communication:** WiFi 2.4 GHz / Bluetooth 4.2 * **Range Extender:** Wi-Fi Range Extender and BLE Gateway * **Mounting:** Wall Mount * **Material:** Plastic * **Operating Temperature:** -20°C to 40°C (-5°F to 105°F) * **Humidity:** 30% to 70% Relative Humidity * **Range:** Up to 10m indoors and 30m outdoors * **Channels:** 20 * **Webhooks (URL Actions):** 20 with 5 URLs * **WiFi Range Extender:** Yes * **BLE Gateway:** Yes * **Script:** Yes * **TMTQ:** Yes * **Encryption:** Yes * **Dimensions:** 37 x 42 x 16 mm * **Weight:** 26 g