Since it is made of premium plastic material, it is ultralight and adds no extra weight to your bike. Featuring simple installation and disassembly, it is convenient to use. Good performance allows adjustment of riding intensity at any time according to different situations. High sensitivity and stable signal make it reliable and practical. It is constructed of plastic material. The boost sensor measures 5.4cm in length and 4.4cm in width. The cable length is approximately 1m. It is suitable for retrofitting, electric bicycles, mountain bikes, and more. Item Name: Boost Sensor Material: Plastic Color: Black Specification: 12 Magnetic Installation Location: Left Side Features: High Sensitivity, Simple Installation, Good Performance Size Details: Boost Sensor: 5.4cm x 4.4cm / 2.13" x 1.73" (Approx.) Line Length: 100cm / 39.37" (Approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the pictures. Please allow slight dimensional differences due to manual measurement. Package Includes: 1 x Boost Sensor (with Line)