Schumacher Manual Battery Charger/Engine Starter 10/30/50 ampsSchumacher Manual Battery Charger Engine Starter 10 30 50 amps Brand Name: Schumacher Automatic or Manual: Manual Product Type: Battery Charger Engine Starter Amps: 10 30 50 amps UL Listed: Yes Reverse Polarity Protection: No Automatic Delay Shutoff: No ETL Listed: No CSA Listed: No Handheld or Wheels: Handheld Number of Batteries Charged at Once: 1 Energy Star Compliant: No Battery Test Function: No 10 amp fast charge, 30 amp booster, 50 amp engine