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Intelligent 36V 48V 60V 72V optional electric bicycle alarm ebike conversion kit bike lock for electric motorcycles adult e bikeNote: The actual product received by the buyer shall prevail, because the appearance of different batches of products has color different, but the function is the same, please don't mind.1.anti-theft alarm line2.anti-theft power linethis two connect to brushless controller the same line is ok(https://www.aliexpress.com/store/product/36V-48V-350W-ebike-controller-Electric-Bike-Tricycle-bldc-controller-for-e-bike-scooter-dual-mode/5040342_33030925676.html?spm=2114.12010615.8148356.1.60ca20dfgVCpXq)can fit the controller as link show