Circle chain electric gourd can also be called ring -chain electric promotional and ring chain heavy gourd. The reason why the ring chain electric gourd is because it uses chain as a lifting and transmission medium. In addition, the large category of electric gourds is divided into two categories, one is steel rope electric gourd, and the other is the ring chain electric gourd. Their difference is the transmission medium, one is the wire rope and the other is the chain. The ring -chain electric gourd is generally used for discicels, the motor is equipped with a brake device, and the electromagnetic brakes and mechanical brake are available. The ring -chain electric gourd produced by Ri Zhi uses a special chain of G80. The hardness is greater than the standard. In terms of warranty, the ring -chain electric gourd warranty produced by Japan is two years and maintained for life.