MULI-DEVICE KEYBOARD FOR MULTI OS-The B503 connect via Bluetooth on Windows, Android or iOS systems. The package include a keyboard, extra keycap, 2 AAA batteries, manual. TYPEWRITER KEYBORD WITH INTERGRATED STAND:The wireless keyboard designed with integrated stand holder to match the desk aesthetic and more space-saving. The keyboard also includes adjustable button feets that can ensure the comfortable long time typing. The built-in tablet phone pad holder is 17.8 inch in length and 0.59 inch in width. 104 KEY WIRELESS KEYBOARD: The cute B503 retro keyboard holds 104 keys. Different from the B303 and B305 who holds 86 keys, the B503 is full layout Bluetooth keyboard that holds numpad. STABLE BLUETOOTH CONNECTION: The latest Bluetooth 5.0 technology of B503 provides a cable-free & clutter-free connection, operating distance of 33FT(10m) without delays. Pair B503 with up to 3 devices and hop between them using the FN+1/2/3. PASTEL RETRO TYPEWRITER KEYBOARD-- YUNZII B503 combines retro style with modern design, compact layout, cute keycap, edge wireless technology, pastel aesthetic that brighten up your desk setup, brings more enjoyable typing.