A1606 is the way to go buddy ive had 4 now fitted to different cars, nice to install aswell . Usual stuff Cat1 ,multipoint imobiliser ,come as standard with ultrasonic's but a duel zone proxy an't much only £40 or so . 3 extra programable buttons , valet mode ,ect ect ect,
on a par with the cliffords imo if not better , I got a mate one off ebay from a genuine dealer for aroud £100 boxed and new
Cheers Ally