CHIRP

William Merelli wrote:

Request if is it possible extend frequency with Chirp on Baofeng UV-5RM

Which band and to what? Band limits are currently inherited from the uv17 pro as such:
_airband = (108000000, 136000000)
_vhf_range = (136000000, 174000000)
_vhf2_range = (200000000, 260000000)
_uhf_range = (400000000, 520000000)
_uhf2_range = (350000000, 390000000)

I expect the OP is asking about altering limits in the radio itself, like is available for some other radios.