Suggested Retail:$100.99. Autopmall Car Alarm Protection System Auto Security 2 Way Remote System Wireless Alarm Shock Alarm No Installation. Overview: No Installation DIY Two Way Car Alarm Auto Security System with Wireless Alarm Siren and No Wires Connect to Car. Special Features: No installation DIY model, no damage to original car circuit Can put in anyplace in the car to enable the alarm function Built in air pressure detection to check door open alarm Built in shock sensor to check car move alarm With built-in 100dB buzzer for alarming on main unit The outside 120dB wireless siren can alarm together, the alarm information is send to siren by wireless The 2 way LCD remote will alarm together with the car lock Remote and alarm distance is about 1000m (Air distance without building) Main unit built in high capacity rechargeable Li battery (battery life about 1 month) New design zinc metal big display LCD remote Remote have vibration silent alarm function (built in vibration motor) Real time clock and parking timer (display how many times from locking the car) Key lock function to protect pressing keyboard by mistake Carrier modulation: FM - FM technology Remote use AAA 1.5V Alkaline battery (Battery life is about 3-6 months) Bright LED alarm indicator 1 one way transmitter add 1 two way transmitter Primary Competitive Advantages: No installation DIY model, no damage to original car circuit The main unit and alarm siren is connected by wireless Built in air pressure detection to check door open alarm and shock sensor for car move Main unit built in high capacity rechargeable Li battery (battery life about 1 month) Real time clock and parking timer. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.