Pic Microprocessor For Ghd 4.2b square Buzzer

Replacement pic processor for GHD 4.2b with square buzzer only, pre-programmed with code.
Works similar to original pic processor with the exception of the sounds which are a different tone.
Features :
Start-up tones.
At temperature tones.
Auto switch off.

Please note this only works with the Mk4 pcb with square buzzer.