About Product:1. The power indicator light is on, about 30-60 seconds perm can work with hot air, hand-held pliers put Perm into the two PP plastic tape. 2. Hand grip clamp handle, wrench jaw clamp two PP plastic tape melt contract on Perm surface for 1 second. (Simulate fusion several times in advance before starting use. Find out the best fusion time of thick and thin belt) 3. Quickly push the clamp handle, Perm quickly shrink back. Let the two pp strap fusion surfaces instantly join. Wrench jaw press the interface for 2 seconds. 4. Loosen the clamp handle, and Perm will automatically extend out and reset. This clamp can work continuously for a long time.