Lansky D-Sharp Portable Diamond Knife Sharpener
It also has a fine 800 grit ceramic benchstone that can be used for polishing straight or serrated blades.
Lansky is a company based in USA specialized in knife sharpening tools
Dimension: 10.9 cm X 3.5 cm X 1.2 cm
Weight: 145 gram
Original product from Lansky, made in China