This product meets the GA413-2003-(rescue slow descent) standards, governor gear rotation system and the friction from the slow system components, according to the weight of different users can be balanced in a short time, so that the rate of decline steadily. Rope as a core rope,rope wire rope core by air, outer layer of high strength synthetic fiber, high strength, safety and reliability. Seat belts for the synthetic fiber material, and can adjust the length according to the size of the user Bust.