Works with aku and remote control without and requirement of motor, electric etc, can open in the air.Ship grabs does not require a cable winding system. Due to its product design our ship grab, which has an omnidirectional usage, is quite highly demanded by our customers. Ship grabs provides big advantages to the dry cargo companies, due to it, maintenence, spare part, userfriendlyness, evacuation speed and simple build. Can be operated up to 100m distance with remote control.