Heavy steel case, high power battery and industrial quality switchgear make this model suitable for starting vehicles up to 350hp. Positive action power switch reduces risk of inadvertent damage by over-voltage. Heavy-duty copper cables with integral polarity reversal LED provide efficient power transfer and reduce risk of polarity reversal. Twin trips prevent damage to battery or internal circuitry. Large, easy to read battery indicator to IEC51 provides fast indication of batterys state of charge. Surge and spike suppressing circuitry reduces risk of damaging vehicles on-board electronics. Fitted with charge balance circuitry to provide even charge to integral batteries. Supplied with mains voltage recharge unit.