BARSKA's 5mW Green Laser Sight incorporates advanced laser optics and electronics into a small, easy to use precision sight. The sight includes a picatinny mount which makes it ...

Just to be safe, let’s treat all laser pointers as though they were more powerful than 5mW and avoid aiming them in the direction of people, vehicles, or aircraft.

A NODEmcu v2 is the brains of the clock — chosen because of its built-in WiFi capacity and compatibility with the Arduino IDE — and a 5mW laser sketches the time onto the sticker.