| 摘要 |
Accessory comprises an audio visual module A mounted on the crane hook block, a relay module B mounted on a crane boom, which may be a telescoping boom, and a receiving module C mounted within the operator station, which may comprise a display 200. The audio visual module A is in wireless communication with the relay module B and is powered independently of the relay module and/or the receiving module. The relay module B may in turn be in wireless communication with the receiving module C Preferably the parts are arranged for two-way communication with one another, preferably over a 5GHz band, and may be mounted to the crane by means of a magnet. The relay and receiver may be wired directly to one another. |
