Sanwa Supply Bluetooth Slim Keyboard numeric (with keypad, black) SKB-BT31BK

It can be connected to devices with built-in Bluetooth, such as computers and smartphones, without a receiver. It can be used on a variety of devices, including Windows, Android, macOS, and iOS. You can register up to three devices and change the device connection by simply pressing a button. It is ultra-thin, measuring just 6mm at its thinnest point, and 14.4mm at its thickest point, making it easy to carry and store. It uses the same pantograph key system as laptops, and the key shape is an isolation type that reduces the risk of your fingernails getting caught.