The Power-Start PS1224HD jump start pack is ideal for starting all 12v and 24v vehicles. Fitted with a 500A safety fuse and supplied with 50mm x 1.8m fully insulated cablesWith 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: 1100/1100 Cranking Amps and 3500 Peak Amps.