This Thatcham Cat 1 alarm/immobiliser is perhaps one of the most respected and established system in the market! Packed with features and an amazing track-record for reliability, the Ai606 offers interior ultrasonic protection; door, boot and bonnet protection, 120db battery back-up siren and connection to either your vehicles central locking or total closure. It also comes with a unique pin code in case you lose or damage your remote control and service over-ride! Price from £235.00

The Toad A850T2 is an upgrade alarm system, designed to enhance existing vehicle security, providing Category 1 status when installed as a compliment to an existing Category 2 immobiliser system. This system is ideal for vehicles which feature an approved factory immobiliser (usually a trasponder type, located within the head of the car key) and utilise a factory fitted remote central locking system. The alarm system automatically arms and disarms when the vehicle is locked and unlocked respectively using the existing central locking remote key. Intelligent circuitry prevents the alarm being disarmed if the car is unlocked by any other means. From £200

The Toad C4 is a compact style upgrade alarm system, designed to enhance existing vehicle security. Providing Category 1 status when installed as a compliment to an existing Category 2 immobiliser system. This system is ideal for vehicles which feature an approved factory immobiliser (usually a transponder type, located within the head of the car key) but do not have remote control of the vehicles central locking as standard. From £200