GreenWorks DigiPro Brushless Series delivers a powerful solution to rival gas powered tools. Easy to use, powerful brushless motor and lower operating cost, this DigiPro Variable Speed G-MAX Blower/Vac offers versatile features and a zero emissions solution for cleaning and clearing debris. The innovative brushless motor technology provides up to 80% longer life, less noise and lower vibration for user comfort. With up to 185 mph wind speed, 340 CFM, light weight, ergonomic design and vacuum capability, this tool gets the job done without the hassle and mess of gas powered blowers--simply snap in the battery and start working. Compatible with our GreenWorks G-MAX system, you can work on clearing your yard and collecting up to 4.5 bags of debris on a single charge using the G-MAX 40V 4.0 ah battery sold separately. Only compatible with GreenWorks G-MAX 40V Batteries Models 29462, 29472 and Charger Model 29482. On the bottom of the blower there is a gate / cover that protects the user from getting into the spinning impeller of the blower. In order to use the blower as a Vac, this gate is opened and a collection tube is inserted to allow for leaf pick. There is a safety switch on this gate and if the gate becomes unlatched during use as a blower, it will not allow the blower to run. Please ask the customer to check to assure that the gate is securely latched and try the battery again.