This document is a family model declaration from Shenzhen Betterup Business Limited, concerning the Zeminba car stereo system, specifically model YS7249. The declaration states that the family models YS7250, YS7251, YS7252, YS7253, and YS7254 are electrically identical. This includes the software parameters and hardware design, such as circuit design, PCB layout, RF module/circuit, antenna type(s) and location, and components on the PCB.
Furthermore, the mechanical structure and design, including the product enclosure and materials, are also the same across all models. The only difference between these models is the model name itself. This declaration confirms that all models share the same circuit and RF module, with the exception of the model name. The document is signed by Peng Jian and dated May 23, 2025.