STANLEY J309 Power Station Jump Starter: 600 Peak/300 Instant Amps with Battery Clamps Delivers jump-starting power with 600 peak amps and 300 instant starting amps Reverse polarity alarm alerts when there is an improper connection; Connect the clamps to the battery, turn on the switch and start your vehicle High-powered LED light rotates 270 degrees to help you work in the dark Triple USB port provides portable power for electronic devices; Refer to user manual before usage of the product Jump starter should be charged every 30 days when not in use; Charges using a standard household extension cord (sold separately)