The MZ M993 Portable Solar Wall Lamp. This type of solar lamp is designed to be mounted on a wall, typically using solar panels to gather energy from the sun during the day and then using that stored energy to illuminate an area at night. Here are some general features and benefits of portable solar wall lamps like the M991:

Energy-efficient: Solar-powered lamps are energy-efficient as they harness sunlight to generate electricity, reducing the need for traditional electricity sources.
Environmentally friendly: By using solar power, these lamps help reduce carbon emissions and reliance on non-renewable energy sources.
Easy installation: Portable solar wall lamps are often easy to install without the need for complex wiring or electrical connections.
Automatic operation: Many solar wall lamps have automatic sensors that turn the light on at dusk and off at dawn, providing hassle-free lighting.
Portable: The portability of these lamps allows you to move them around as needed or take them with you on outdoor adventures.
Versatile: It can be used for various purposes such as outdoor lighting, security lighting, or decorative lighting.