Introducing the new Hayes G2 Brake Boss trailer brake controller with an audible signal alert for connection continuity a market-exclusive feature that makes for safer braking. The easy-to-find, easy-to-use manual emergency braking control lets you apply full power in emergency stopping situations. The three-axis accelerometer technology automatically levels and senses the rate of deceleration.Accommodated Number Of Trailer Axles: 1 To 4 AxlesType: Audible Signal Alert Three-Axis AccelerometerBrake Systems Type: 2 To 8 Brake SystemReverse Function: Fully Functional In ReverseLeveling: AutomaticDisplay: LCDWith Alarm: YesWith Wiring Harness: NoFeaturesSleek New Design. Signaling A New Design In Trailer Braking Safety And PerformanceAudible Signaling Alert For Connection Continuity For Safe Braking Large, High Resolution Diagnostic Liquid Crystal Display Panel, Shielded From GlareLow Profile, Modern DesignCompatible With The Hayes Quick Receiver Mounting Sleeve And Quick Connect Wiring HarnessesLimited Lifetime Warranty