Baofeng Walkie Talkies (5kms Range)

Functions 16 channel. 1500mah li-ion battery. 50 ctcss/105 cdcss. vox function. pc programming. emergency alarm. battery save. low voltage alert time-out timer. flashlight. specifications - frequency range: uhf 400-470mhz. - rf rated power: ≤ 5w. - channel spacing: 25khz. - operated voltage: 3.7v. - battery: 1500mah li-ion. - battery life: about 8 hours. - frequency stability: ±2.5ppm. - operated temperature: -30°c-+60°c. - antenna impedance: 50ω. how far can this radio be connected ? - communication range: about 2-4km.