Check the listing for details. Brain for Viper 3100V 1-Way Security System Keyless Entry Car Alarm System. Condition: New. Listed at 14.99 USD. What We Sell Brain for Viper 3100V Keyless System 4-Channel 1-Way Car Alarm Security System 3100 Directed Electronics Brain ONLYdoes NOT include wiring, remotes, instructions or owners manual, this is only the replacement braincompatible Viper 3100V as well as Avital 3100LX, 3100L. Requires Profession Installation, item does not include any wiring, remotes, wiring diagrams, owners manual, installation instructions or anything other than the Brain itself. Package Contents: 1x Brain for Viper 3100V Policy:// NEED TO PRICE MATCH?See lower price? We will try to give you an even lower price! Just ASK us!// NEED TO TALK TO US?Just email us and we will get back to you within 24 hours// NEED TO RETURN or EXCHANGE?You can return the unit with Ebay Easy Return step or just email us and we will tell you the exact instruction on how to return the unit. We will also give you an RA# so the unit won't be lost.// OUR RETURN / EXCHANGE POLICY30 days full refund . We will pays for shipping 2-way for any defective units . Unwanted? Just return it ot us for full refund . NO QUESTIONS ASKED!