Made of high-strength materials, shock-resistant and durable. Intelligent design provides stable speed and responsive and direction control. Strong metal can effectively protect the internal circuitry and facilitate heat dissipation. Durable cables and interfaces low failure rates over long periods of use. High brightness to improve safety at night. type: 17A 3-mode sine wave controller kit Material: Metal+Plastic colour: As Shown Package Contents: 1 x Controller 1 x Instrument 1 x Dial 1 -assisted magnetic point Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.