The NX-340U16P is a high powered radio perfect for indoor productions with heavy obstructions, high noise, and a lot of structures and will work up to 400k square feet - but this unit also works well outdoors with a distance of 10 to 20 acres! These are extremely dependable and durable two-way radios. For the same high quality performance at a scaled down and more economical, the 2 watt version of this unit will still work indoors, up to 250k square feet, in an environment with a lot of noise and heavy obstructions - and perform well in similar outdoor settings up from 3 to 10 acres.