The Power-Start PS510 jump start pack is suitable for starting a good range of small 12v petrol vehicles and some small 12v diesel vehicles. With safety in mind, each starter pack incorporates many safety features: Reverse polarity warning reduces the risk of wrongful connection, spike protection circuits reduce the risk of damage to the vehicle on-board electronic systems and the on/off isolator switch enables a safe connection due to non-live cable clamps and also avoids unintentional short circuit. Specification: 510 Cranking Amps and 1200 Peak Amps.