Kalkulators is a versatile device that combines an 8-digit calculator and a numpad/macropad in one unit. It features a blue 7-segment display, powered by a single AA battery, and can also operate via USB-C. The assembly consists of a durable FR4 sandwich design, including a backplate, main PCB, and switch plate, with the display protected by a smokey acrylic cover. Key features include display dimming, support for QMK and VIA firmware customization, compatibility with MX switches and PCB mount stabilizers, and automatic switching between calculator and keyboard modes when connected to a computer. The dimensions of the Kalkulators are 76 mm x 204 mm, with a height of 30 mm. The kit includes an assembled PCB (minus switches and stabilizers), a switch plate, a back plate with an embossed design option, a laser-cut acrylic screen guard, and necessary M2 hardware, while users need to provide their own switches, stabilizers, keycaps, and an AA battery. Pricing is expected to be around 70 euros plus shipping.