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Strong function:Intelligent mode, proportion mode, on/off Mode etc. all types of control signal. Small bulk:the bulk is just about 35% of the similar product. Light weight:the weight is about 30% of the similar product. Credible performance:the bearing and other key items are imported from the famous brand products. Attractive modern styling:the die-casting aluminium alloy cover to cut down electromagnetic interference. Precise and anti-friction:The integrative turbo output stem with heavy intension and able to friction. Very small difference:the turbo outpu t stem integration. Safe guaranteed:Pass the 1500V compression resistance. Conveniency to use:unnecesary to oil and exam, waterproof and antirust,install with any angle. Protector:Dual limitation,over heat protection,over loading protection(optional function). Multi-speed:The stroke time 5 sec.,10 sec.,15 sec.,30 sec.,60