Features: Made of high intensity aluminum alloy material shock-resistant and durable. Intelligent design provides speed and sensitive control of braking and direction changes. Solid metal can effectively the internal circuit and facilitate heat dissipation. Durable cable and interface ensure a low failure rate when used for a long time. Suitable for electric bicycles scooter. Great replacement for Kugoo M4. Specifications: Material: Aluminum Alloy Voltage: DC 48V Brakes: Low Level Current: 20A Speed Set: 1.1-4.2V Dual Mode Item Size: 10 * 6 * 3cm / 3.9 * 2.4 * 1.2in Item Weight: 249g / 8.8oz Package List: 1* Motor Controller