The product is a 5V wifi inching/selflock relay module from SONOFF. It integrates the functions of a typical SONOFF switch and can operate with the eWelink app, as well as with devices such as Amazon Alexa, Google Home, and IFTTT.

Below are the main features:

• 5VDC input
• Compact size
• Output with waterproof contact
• Two operational modes: inching mode and self-locking mode

When the module is set to self-locking mode, users can instantly turn the connected device on and off. In the case of inching mode, users can use the ON/OFF button to control the connected devices.

Additionally, the product allows remote control via the eWeLink app, which is available for both Android and iOS. Supported features include:

• Remote ON/OFF control
• Scheduled scenarios
• Device sharing
• Group management
• Compatibility with Amazon Echo, Echo Dot, Amazon Tap
• Compatibility with Google Home, Google Nest
• Compatibility with IFTTT