Features1Powerful Adaptability: The controller is suitable for many different models of motors, including 24V250W, 24V350W, 36V250W, 36V350W, 48V250W and 48V350W with or without Hall brushless motors, ensuring that it can be applied to all kinds of mountain bikes for lithium conversion. 2Self Learning Function: The controller with self learning function can intelligently adapt to the characteristics of different motors to achieve more accurate and efficient drive control and provide powerful power output. 3Material And Design: The controller housing is made of metal with groove design, which can effectively dissipate heat and protect the internal circuit from damage of thermal overload. The instrument is made of durable ABS material, which is lightweight and sturdy, with good toughness and waterproof performance, and can operate reliably in various complex environments. 4Enhance Riding Fun: With the lithium conversion of electric bikes, mountain bikes can get a higher speed and more efficient riding experience, which greatly enhances the riding fun. Both cyclists and riders who like challenges can enjoy a smoother and exciting riding experience. 5Safe And Reliable: The controller has good heat dissipation performance and temperature control protection function, which can prevent thermal overload and protect the safe operation of the internal circuit and electric system. The use of good materials and fine design, so that the entire controller with reliability and stability, to ensure the safety and trust of users in the process of riding.SpecificationItem Type: Bicycle Lithium Battery Modified SetMaterial: Aluminum Alloy And ABS PlasticWeight: Approx. 693g / 24.4ozCurrent: 171APackage List1 x Controller1 x Panel1 x Panel Manual1 x Trigger Shifter1 x 2 in 1 Waterproof Cable1 x Power Assist Sensor1 x Power Assist Magnetic Ring1 x Instruction Manual