Standardly an Electric Chain Hoist is operated by a hard-wired low voltage pendant control, but like with all things, there are levels and one of the optional extras is “Radio Control”.
Radio control is principally like operating your TV except for your TV operates over Inferred and an Electric Chain Hoist with Radio Control operated over radio frequency; a stronger and most reliable signal that can be operated from a further distance.
Radio control enables the operator to stand at a safe distance from the load when operating the hoist also giving them a better view and angle of the load when hoisting in to place or loading/unloading a truck or delivery. Radio remote control is often required as standard in applications like gas and nuclear where being close to the load is considered a danger there for it is essential to have radio control with all electric chain hoists. http://electricchainhoists.co.uk/