AEM 30-3020 Water/Methanol Injection Monitor Actively monitors the entire injection curve and its relationship to injection progression; can be used with any injection system with  inch OD tubing; tunable PC based software with USB connectivity Legal in California only for racing vehicles; AEM strongly recommends that users never exceed a 50% methanol concentration; AEM holds no responsibility for any engine damage or personal injury that results from the misuse of this product Note: For optimum results, all water/methanol injection systems and gauges should run with an AEM inline filter (AEM part #30-3003) One low side (ground) driver and one high side (+12v) driver can be configured to turn on or off during an alarm condition; internal data logger records all injection flow and alarm status data Built in warning lights inform the user of an alarm trigger; offers a live gauge view that displays both injection percentage and flow; fully adjustable alarm delay and alarm reset period