Heavy-duty steel case, high power US manufactured battery and industrial quality switchgear make this model suitable for starting most vehicles. Positive action power switch reduces risk of inadvertent damage by over-voltage. Heavy-duty copper cables provide efficient power transfer. Twin trips prevent damage to battery or internal circuitry. Easy-to-read LED battery indicator to IEC 51 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.