Features1Manufacturing Material: The controller housing is made of high quality metal material, groove design, with good heat dissipation function, can protect the internal circuit, so as to avoid thermal overload. 2Stable Speed and Sensitive Control: Brushless motor controllers provide steady speed and sensitive control of braking and directional changes. 3LCD Display Screen: The electric bicycle brushless motor controller is easy to install and use, LCD display screen, mounted in the middle of handlebars, handle diameter range are 22.2mm / 0.9in, 25.4mm / 1.0in, 28.6mm / 1.1in adapter ring. 4Instrument Display Contents: Single running mileage and running time, real time speed, battery power and voltage, gear indication cumulative average speed, total mileage, cumulative maximum speed, cruising indication, 6km/h boost and indication, real time running power, real time running current, fault icon code, etc. 50.3A Meter USB Charging Port: The maximum current of the meter USB charging port is 0.3A, which can charge the mobile phone well. Without any difficult requirements even though you use it for the first time.SpecificationItem Type:350WControllerKitWeight: Approx.505g / 17.8ozMaterial: Aluminum AlloyController Box Size: Approx.9 x 5.3 x 3cm / 3.5 x 2.1 x 1.2inPower: 350WCurrent Limiting: 13APackage List1 x Controller1 x Instrument1 x Manual