Alarm & Immoboliser

Product 1 DATATOOL (approx £300):

http://www.datatool.co.uk/consumer/products/products/index.php?product=system4_c1

Product 2 CYCLONE V2 (£26.99):

http://cgi.ebay.co.uk/CYCLONE-V2-MOTORBIKE-MOTORCYCLE-ALARM-IMMOBILISER_W0QQitemZ200379831192QQcmdZViewItemQQptZUK_Motorcycle_Parts?hash=item2ea7919398

Now my question is whats the difference. and why are prices very different?

Thx in advance peeps