Applicable to all kinds of push-pull type window open, aluminum alloy material, exterior design vogue beauty. Excellent design, smooth transmission, electronic overload protection, to ensure the safe use. More than 10,000 times to launch and push pull test, more open and push pull schedule can design more stable running, achieve 200N. Suitable for all kinds of public places, factories, hotels, etc to be open doors and Windows, occasions are also suitable for home use, installation and after many tests run faster, shorten the open time.