Professional model suitable for repair shops, body shops and auto electricians, with patented microprocessor control and display showing error code. It offers ease of operation with extensive protection functions, such as against incorrect polarity or overvoltage, ensuring that there is no damage to the battery after prolonged discharge. Four-cell LiFePO4 battery ensures high safety against spontaneous ignition and lasts five times longer than devices with conventional rechargeable batteries (3,000 cycles).Professional model for workshops, body shops and auto electricians. Microprocessor control, error display, overvoltage protection. Safe and durable LiFePO4 battery (3000 cycles).