World's smallest Wi-Fi relay switch with power metering. Automate lights & appliances in under 10 mins and monitor power consumption. Equipped with Shelly chip & all Gen3 features. KEY FEATURES Equipped with a new processor & increased flash memory - ESP Shelly Improved durability of terminals Supports up to 8 A at 240 VAC Wi-Fi range extender & Bluetooth gateway Precise and real-time power metering with free cloud data storage for analysis and energy usage optimization. No hub required! Easy control through the Shelly Smart Control app, most platforms and protocols, as well as voice assistants. Use it with Alexa, Home Assistant or your preferred automation platform Supports scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates Supports KNXnet / IP communication NOTES Standard warranty (included in purchase price): 3 Years warranty through manufacturer due to device malfunctions when it is used in user manual described conditions. While this is technically user-installable in many locales, we recommend consulting a licensed electrician to install automation components - in addition to being licensed to work with electrical devices, they are also familiar with local building codes. Manufacturer's note: Each Shelly device emits heat under load. Do not combine two or more Shelly devices stacked on top of each other in a confined space. There must be a minimum distance of 1 cm between them to allow for airflow. SPECIFICATIONS Quantity Value Physical Size (HxWxD): 29x34x16 ±0.5 mm / 1.34x1.11x0.63 ±0.02 in Weight: 18 ±1 g / 0.63 ±0.04 oz Screw terminals max torque: 0.4 Nm / 3.5 lbin Conductor cross section: 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) Conductor stripped length: 6 to 7 mm / 0.24 to 0.28 in Mounting: Wall box Shell material: Plastic Shell color: Red, C-3%; M-100%; Y-70%; K-12% Terminal Color: Black Environmental Ambient working temperature: -20 °C to 40 °C / -5 °F to 105 °F Humidity: 30 % to 70 % RH Max. altitude: 2000 m / 6562 ft Electrical Power supply: 110 - 240 VAC Relay: NO contact, 1-pole, µ contact Power consumption: < 1.2 W External protection: Tripping characteristic B or C,max. 10A max. rated current,min. 6 kA interrupting rating,energy limiting class 3 Output circuits ratings Max. switching voltage: 240 VAC Max. switching current: 8A/240 VAC Max. switching power: 2000 W Power measurement: Yes Voltage protection / Cutoff: Yes Current protection / Cutoff: Yes Max power protection / Cutoff: Yes Sensors, meters Internal-temperature sensor: Yes Radio Wi-Fi Protocol: 802.11 b/g/n RF band: 2401 - 2495 МHz Max. RF power: < 20 dBm Range: Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors(Depends on local conditions) Bluetooth Protocol: 4.2 RF band: 2400 - 2483.5 MHz Max. RF power: < 4 dBm Range: Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors(Depends on local conditions) Microcontroller unit CPU: ESP-Shelly-C38F Flash: 8 MB Firmware capabilities Schedules: 20 Webhooks (URL actions): 20 with 5 URLs per hook Scripting: Yes MQTT: Yes UDP: Yes Advanced schedules: Yes KVS (Key-Value Store): Yes