This modification does not impair the waterproofing of the alarm or your warranty (if any remains) it does need a coloured wheel to be fitted, the wheel is NOT included in the price. The illustration shows a clear wheel set up with blue underlight. Simply add the amount you require to the basket and checkout as normal, then send your alarms with a print of your purchase confirmation to 
Advanced Technology Tackle,
ATTN: Darren Henwood,
PO Box 962,
Dagenham,
RM9 9LT.

Please note that a white LED is fitted by default to illuminate your wheel this means you can change your wheel colour at a later date, BUT if you do not plan on changing your wheel colour make a written note to ask for colour matched LEDs as this gives a better "depth" to the colour of the wheel when lit.

Also note that if isotopes are fitted to the old alarm the backplate will be returned with them in it along with the upgraded alarm. ATT are unable to provide isoptopes they should be obtained from an authorised dealer.