The document summarizes the specifications and features of the H280 portable two-way radio. It lists the following key features: supports military standard MIL-STD-810 for durability, IP54 water and dust resistance rating, 1300mAh high capacity battery providing over 11 hours of use, and 16 channel capacity. The radio has a frequency range of 136-480MHz, supports 25/12.5KHz channel spacing, and has a transmit power output of 4W/2W depending on frequency band. It is 102mmx51.5mmx28.5mm in size and weighs 220g with antenna and battery installed.

1. H280
(产品型号展示优化词：Portable Two-way Radio&Walkie Talkie H280 )
Features：
* Accord with the USA
military standard MIL-STD-
810-C/D/E/F, CE,FCC and
IP54.
* 1300mAh high capacity Li-
ion battery
* Priority Scan
* Battery Saving
* Manual Alarm
* CTCSS/CDCSS
* Low battery warning
* Time out timer (TOT)
* Busy channel lockout
* 25/12.5KHz Channel
Spacing Modulation
* Monitor Function
* Voice Prompt
* MOSFET final stage power
amplifier
* Clock frequency shift function
* Selectable squelch level(1-9)
Specifications:
General H280
Frequency Range VHF:136-150MHz 150-174MHz
UHF: 350-370MHz 370-390MHz
400-440MHz 440-480MHz
Channel Capacity 16
Channel Spacing 25 /12.5 KHz
Operating Voltage 7.4V
Battery Capacity 1300mAh (Li-ion)
Battery Life (5-5-90
Duty cycle) 2050mAh
Li-ion
more than 11 hours
Frequency Stability ±2.5ppm
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2. Operating Temperature -20 ~+50℃ ℃
Antenna Impedance 50Ω
Demensions(with
battery, without
antenna)
102mm×51.5mm×28.5mm
Weight(with antenna &
battery)
220g
Transceiver H290
RF Power Output
4W/2W（UHF）
Modulation 16KΦF3E/8KΦF3E
Spurious and Haronics ≤-27dBm
FM Noise 40dB
Audio distortion ≤5 %
Receiver H290
Sensitivity 0.25/0.28 μV
Adjacent Channel
Selectivity
60/55dB
Intermodulation 60dB
S/N 45/40dB
Audio Power Output 500mW
Audo distortion ≤5%
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