Built using the same shaft, gearbox and blades as found on the gas-powered HL 94, the HLA 135 with its 145° adjustable blade gives professionals the benefits of clean, quiet battery power in build and design with proven durability thanks to zero exhaust emissions and low noise. A virtually maintenance-free brushless motor delivering consistent power and a variable-speed trigger with three performance levels mean pros don’t have to compromise the job to reap the benefits of Battery Power. Made By STIHL. It combines a proven, durable weather-resistant design with an onboard battery slot that can support either an onboard battery or a backpack battery for even longer run times.   This tool is IPX4-rated weather-resistant construction and has been designed and tested for splash water protection.