We are professional do e-bike kits business for many years for the customers all over the world, and have met so many troubles, with these troubles, we have much experience on e-bike kits today. Our e-bike kits are easy to install and allow you to convert your standard bicycle into an fun and eco-friendly e-bike. Since every model is different and components will vary, it's your responsibility to determine the best way to install an electric bike kit on your bike. Although most of the steps are similar from install to install, we have instructions can help the customers to convert their bicycle. More functions see the specification The features of HWBS is, can use generic brake, without the use of special brake lever. Sensor installed on the soft shaft of the brake, detection the movement of brake lines online. HWBS is a long life, small volume, free maintenance, micro-consumption electronic, low voltage power supply, non-contact detection of magnetic sensors. Internal PLL circuit can ensure the stable output even use in vibration situations. All these accessoriescan be used on the bikes. Thank you