"2.5R" is the name given to a series of products of dimensions 58.5mm x 58.5mm x 29.3mm - a square of a size that fits comfortably in the hand - and which have different functions. The name comes from the fact that the corners of these boxes all have an R of 2.5mm. A long time ago, the corners of wooden furniture and fixtures were not rounded; the corners were planed off, and this "chamfering" relaxed any excessive sharpness. Since the size of this chamfering translated into an R of 2.5mm, 2.5R is a roundness of the corners that feels comfortable to the touch.

Description: LCD Alarm Clock.
Materials: Plastic ABS, resin méthacrylique.
Dimensions: Height: 2,9 cm, Depth: 5,8 cm, Width: 5,8 cm.