Includes two batteries for operational testing. A 2-way air pump that works with both a car and dry cell batteries, with a convenient hose. A National Air Pump 1300 is included as a bonus. The inside is considerably corroded. It works, but sometimes needs to be shaken to turn on. - Brand: Hapyson - Model: YH-737B - Type: 2-way air pump - Power Source: Car and dry cell batteries - Accessories: DC adapter, hose, battery - Condition: Used Thank you for viewing.