supply of uhf walkie-talkie ( ip 67 license free radio ) with battery of 7.4v / 2000mah li-ion and 16 channel, channel spacing 12.5 kilo hertz, rf power output range 0.5w to 4 watts programmable ( uhf ) with frequency range 446-446.2mhz ( pmr 446 ) , heliflex uhf antenna, belt clips, rapid charger stand with ac adaptor. frequency stability 2.5 parts per million. audio output, ( with less than 5 percentage distortion at 1 khz reference measured at specified af output ) minimum 500 milli watt. frequency deviation 2.5khz max. for 100 percentage at 1khz. output voltage of the charger 12volt. protection against high vswr / ctcss or dcs / capable of vox for hands-free operation. sensitivity at 12 db sinad 0.3 micro volt, squelch sensitivity of receiver 0.25 micro volt. adjacent channel selectivity ( db ) 60. number of spare batteries with each radio set-1 number. 2 sets of programming kits including necessary software and hardware to be supplied. the offered make / model should have the availability of test report from central govt / nabl / ilac accredited lab to prove conformity to the specification. the test report to be submitted while submitting the bid. sample should be supplied before bulk supply. [ warranty period: 24 months after the date of delivery ]