wireless numeric keypad, trelc mini 2.4g 18 keys number pad, portable silent financial accounting numeric keypad keyboard extensions with wireless mouse for laptop, pc, desktop, notebook(black) trelc <b>specification:</b><br> operating frequency: 2.4g technology<br> structure fixed way: fastening buckle bitv<br> case material: abs<br> power supply: 3 * aaa battery (not included)<br> effective distance: approximately 32.8ft (10m)<br><br> <b>package contents:</b><br> 1 x 18 keys wireless numeric keypad<br> 1 x wireless mouse<br> 1 x 2.4g wireless usb receiver<br>