From Broadhong design studio:

‘A dice made of assembled keys of an abandoned laptop computer. You can play games with new rules if you use the dice with numbers on it with a symbol dice.’

‘+’  and numeral = Go ahead as numeral
‘-’  and numeral = Go back as numeral
‘End’  and numeral = No chance to move
‘Home’  and numeral = Do all over again
‘PgUp’  and numeral = Throw the dice two times and go ahead as plus numeral
‘PgDn’  and numeral = Throw the dice two times and go back  as plus numeral

link  :  http://www.dsgnwrld.com/keyboard-dice-by-broadhong-6276/