Blue Man backpack has 20L capasity, 70psi, 3.1L min pump.
Rechargeable 12V Maintenance battery (The backpack comes with a battery installed within)
Working time 5hours non stop, charging time 4 to 6 hours from mains.
Includes variable pump controller.
We advise you to charge it after each full day use without relying on the LED indicator
Full power switch. When you switch on from the ON/OFF button it works full power and bypass the variable controller External Fuse holder, you can change and check the fuse externally without opening the unit.
We do not stock spare batteries