Autopearl Electronic Stereo Radio AM FM Hidden Antenna for SUV Description - can Amplify FM signals. Mount onto windshield for the best reception. This car electronic antenna is a non-directional antenna which can be mounted anywhere on your windshield. Mount it in your car to strengthen the signal and to get clearer reception for all your favorite stations. Specification - input voltage -12v FM gain -14db AM lw-sw gain -18db absorption - 8ma reception range -FM-AM-lw-SW contents mount -adhesive material - plastic.