the pitch can be adjusted. There are usually two knobs at the bottom of the central control screen to adjust the volume and the right knob to adjust the songs. Shenghao is one of the brands that have done well in low-speed four-wheeled vehicles. Now, the main products are such "plastic-framed vehicles". The biggest feature is its small appearance, bright colors and changeable shapes, which belong to exquisite and high-end categories.