Smart Belay - A revolution in the self belaying product sector. Belaying with conventional self protection systems still carries the risk that the park visitors can completely detach themselves from the safety system. EDELRID has closed this safety hole with the revolutionary Smart Belay. A system of communicating, interconnected pulley carabiners. If one carabiner is open the other carabiner realizes this, and when being utilized properly - will not open until the other carabiner is clipped and closed on the safety cable. Only then using the accepted utilization methods the other carabiner can be unclipped. Therefore an accidental complete unclipping is virtually impossible. The advantage is increased safety for the visitor, less risk and more peace of mind for the operator. The pulley carabiners are designed specifically for zip lines and replace the double pulley. The slick ergonomic design of the Smart Belay allows easy operation by children and adults alike. The Smart Belay is optionally available with integrated shock absorber (6 kN) which as a rule can replace other rescue devices.