This is the same disc that comes with the LM-400EXP and the LM-500H. It has a 3m adhesive on one side and is smooth on the other so the suction cup can attach to it. This allows you to place your suction cup mount on the dash or windshield. An extra disc is great for putting in your other car, so you can move your mount quickly between vehicles.
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Lido Radio Products 5405 Suite A-796 Alton Parkway Irvine, CA 92604
Contact us at 949-690-5616 or send us an e-mail at firstname.lastname@example.org