... features:1, carry convenience: This product small volume, light weight, small and exquisite, compact structure, easy to carry.2, installation is simple: ... :1, carry convenience:This product small volume, light weight, small and exquisite, compact structure, easy to carry.2, installation is simple: ... 3 and the lifting speed:4 SEC 1 m, 10 floor 3 minutes to play back, with "special tools" the lifting ...