This product has an EEC/CE certificate and is suitable for the European market. It provides a green travel method that is very suitable for medium distance travel, and the engine is energy-saving, which also means low cost. BMS system: overcharging protection, over discharge protection, temperature protection, overcurrent protection, short circuit protection, battery balancing. The controller has stable performance, good heat dissipation, flexible control, sensitive response, and reliable quality. Optional items: rear box, rear bracket, fast charging. High capacity battery cell, powerful enough to support a longer cruising range than ordinary batteries. What's more, it has portable lithium battery holder for customers to take out easily and charge conveniently. Famously smooth and powerful motor provides instantaneous acceleration, as well as an effortless and balanced experience. This motor is suitable for users who drive for long distances, climb hills in mountainous areas, and carry heavy loads. 1.Why did we choose you as our business partner with so many suppliers? We have been focusing on the production of automotive components for over 15 years, and most of our customers are North American brands. In other words, we have also accumulated 15 years of OEM experience for high-end brands. 2.Can I get a sample to check the quality? We are pleased to provide you with samples for testing. Please leave us a message stating the product you want and your address. We will provide you with packaging information for the sample and choose the best way to transport it. 3.What is your delivery time? Normally, our delivery time is within 5 days after confirmation.