A new touchpad system from CompuStar lets you tap a code onto your windshield to arm and disarm a car alarm.
The device sticks to the inside of the windshield with a key pad pressed against glass. The sensors in the keypad (visible from outside the car) are sensitive enough to register commands behind the glass. You can arm/disarm your alarm and unlock the doors. If you double tap on the system it will page your 2-way remote so you can find your keys.
The system launched in June at $49.99 and is compatible with CompuStar AlarmIt and MaxIt remote start or security systems.