1:suitable for wind turbine blow 10KW;2:locking generator fully during storm or maintenance to avoid damage to wind turbine system and worker;3:digital multi meter to read power produced by generator,eg.Watt/current/ votage/frenquence etc-Opitional4:timer control to avoid damage resulted from large current to controller.5:easy connet to generator and controller, no need to dismantle these products.