Baofeng Long Range Walkie Talkies 4 Pack Bf-888s

The frequency range of walkie-talkies is uhf 400-470 mhz. each radio has 16 preset channels and the same frequency for direct use. when you turn the channel knob, you can easily change the channel and the voice will tell you the channel number. the channel frequency is programmable within the frequency range; you can program any of the 50 ctcss audio and 105 cdcss audio on each programmed channel. each two-way radio is equipped with a 1500 mah rechargeable lithium-ion battery and a us charging cradle. it takes approximately 4 - 5 hours to fully charge, and the sustainable use time of a full charge is approximately 8 - 12 hours, depending on the amount of use. when the battery is too low, the walkie-talkie will automatically transmit the low battery.