Smart switch Shelly 1 Gen4, wireless, 240 V AC, Bluetooth 5.0/Wi‑Fi/ ZigBee, plastic housing, 42×16×37 mm, pack of 2

Shelly 1 Gen4 is a compact wireless smart switch designed to control lighting and electrical circuits remotely. The module accepts 240 V AC input and is housed in a small plastic enclosure measuring 42×16×37 mm, making it suitable for installation behind wall switches or inside junction boxes. Supplied as a pack of two, this smart relay supports low standby consumption and integrates with mobile apps and voice assistants for convenient scene and automation control.

Advantages

The small size and plastic housing allow installation in tight spaces without additional adapters. Wireless connectivity enables remote on/off control and scheduling from a smartphone or home automation hub. The device’s low power consumption helps reduce standby energy use, and compatibility with common automation platforms simplifies integration into existing smart home setups.

Suitable for

• Retrofitting traditional wall switches to add smart control
• Controlling lighting circuits, including LED and incandescent loads
• Creating automation scenes and schedules for energy savings
• Integration with voice assistants and mobile apps for remote control

Key specifications

• Operating voltage: 240 V AC
• Typical power consumption: 1 W
• Housing material: plastic
• Dimensions: 42 × 16 × 37 mm
• Package contents: two identical smart switch modules

How to use

Install the Shelly 1 Gen4 module in-line with the load or behind an existing wall switch, ensuring the supply is switched off before wiring. Connect the input and output conductors according to the device’s wiring diagram and restore power. Use the Shelly mobile app or a compatible home automation platform to discover the device, configure Wi‑Fi settings, set schedules, and add it to scenes or voice assistant accounts.

Recommendations

For safe and reliable operation, mount the module in a dry, ventilated location inside an electrical box, follow local electrical codes, and confirm load compatibility (type and wattage) with connected fixtures. If unsure about wiring, consult a qualified electrician. Regularly update firmware via the app to maintain security and feature compatibility.