The TK-3400U16P durable two-way radio is ideal for conditions where you need a rugged and dependable communication device with the power to work in an environment with some obstructions. In an indoor setting, this device works up to 250k square feet and can handle between 3 to 10 acres for outdoor applications in areas with a moderate amount of hills and trees. For a lighter and more economical model, the PKT-23K may suit your needs - and for outdoor situations where power and distance are key, the NX-340U16P is your best tool.