The JCA002 shell is made of wool yarn. The material of the shell is ABS plastic. It is fixed with screws. It can be waterproof with black glue inside. The ceramic antenna has a size of 25 * 25 * 4mm and a frequency of 1575.42MHz on a 27mm PCB. The frequency is mainly determined by the silver layer above and below the antenna. The PCB is silver white and green and is tinplate
