This combo kit comes with the ability to use as either a backpack blower for maximum runtime or as a handheld blower for quick convenient clean up! When it comes to power this blower doesn't hold back! At 730 CFM and 190 MPH this has incredible power and as part of our WHISPER SERIES it is 85% quieter than a gas blower! Packed with premium features, this blower has all you need and provides ultimate control. Features include a variable speed trigger, cruise control option, turbo button, and speed tip attachment. The innovative backpack power supply unit has three active battery ports that can use any variety of 40V batteries. The backpack can connect to select RYOBI 40V handheld tools, like a string trimmer, to give you the maximum amount of runtime when you are tackling big jobs or are using these tools professionally and have multiple homes or businesses to maintain. On board LCD screen displays fuel gauge of all batteries in the backpack and when it's time to charge the backpack doubles as a multiport rapid charger! This has 4X faster charging and will charge the included (2) 6 Ah batteries in under 60 minutes each. The batteries are compatible with the RYOBI 40V system. The 40V HP WHISPER SERIES Handheld/Backpack Blower is backed by a 5-year tool warranty.