Dospara is offering you their newest mini wireless keyboard ‘DN-915040' that comes with a built-in trackball. Measuring W113mm x D262mm x H31mm and weighing 300g, this travel-friendly keyboard makes use of 2.4GHz radio frequency (works up to 9 meters) and has 78 English layout keys (w/ 16 hotkeys), a scroll wheel w/ 2 click buttons and a tiny USB receiver.
Powered by 2x AA batteries, the DN-915040 supports for Windows 7, 8, 8.1 and 10 operating systems. Backed by a 6-month warranty, the Dospara DN-915040 Mini Wireless Keyboard With Built-In Trackball is available now for just 2,999 Yen (about $27). [Product Page]