These cufflinks are very different. Made from brushed chrome, they are designed as a pair of aeroplanes with working lights.
To turn the landing light on all you have to do is press the black switch at the back.
The round back of these cufflinks contains the battery - it does not remove to go through the sleeve (unscrewing it will reveal the wires). The thickness of it does mean you need to firmly push it through the button hole and may make it unsuitable for shirts with smaller holes.
Dimensions (LxWxH): 18mm x 19mm x 7mm (approx.)
Weight per cufflink: approx. 9g (average)
Size = x mm (W x H)