AutoPage RF425A 4-Channel Vehicle Alarm Security System with 2-Way AM/AM LCD Transmitter 4-Channel vehicle alarm security system. Includes a 2-way AM/AM LCD Transmitter and a 5-button companion remote Ergonomic LCD transceiver with 19 visible icons make the system easy to use. High frequency transmitter provides an extended long range signal. Dedicated trunk release remote command output for vehicles with power truck release. Dual stage shock/impact sensor. High Output LED status indicator. 2 car operation. Anti code-grabbing technology for the highest security. Parking Light Flash for visual confirmation when locking and unlocking. Dome light supervision for interior "light's on" when you enter your vehicle.