1. Multi band reception and amateur band transmission;   3. Aviation frequency band reception; 4. Quickly pair a channel; 5. Automatic/manual emergency alarm; 6. Power on password; 7. DTMF selective calling, group calling, individual calling; 8. Multiple charging options: Type-C charging, USB desktop charging; Function: NOAA weather alert Quickly copy a channel 10 sets of scrambling frequencies flashlight Reverse frequency function Timeout timer 1750Hz call tone Channel 200 Multi band transmission and reception Emergency alarm Multiple scanning Setting of offset frequency direction Bias frequency setting Wide/narrow bandwidth Adjustable noise level Keyboard lock Automatic backlight off time selection Wireless replication DTMF/DTMF ANI H (high), M (medium), L (low) output power selection Separate CTCSS/DCS sound Channel storage Computer programmable AM Airband frequency band reception; FM radio Busy channel lock Large screen LCD display screen Cross band reception/transmission   Description: General specifications Channel 200 FM radio channel 20 NOAA Channel 10 Frequency stability ± 1ppm Modulation mode FM: 11K φ F3E (12.5Khz) sixteen φ F3E (25Khz) Size 115m * 60mm * 37.5mm (excluding antenna) Net weight 225 grams (including antenna and battery) Working temperature -10 & 8451; to+50 & 8451; Antenna impedance 50 Ω   receive Frequency modulation sensitivity (12dB SINAD) F1 (50-76MHz) -121dBm F2 (108-135.9975Mhz) -121dBm F3(136-173.9975Mhz)-123dBm F4(174-349.9975Mhz)-123dBm F5 (350-399975Mhz) -123dBm F6(400-469.9975Mhz)-123dBm F7 (470-59.9975Mhz) -121dBm WFM (20dB SINAD) WFM (76-108MHz) -110dBm AM (10dB signal-to-noise ratio) F2 (108-135.9975MHz) -113dBm Audio frequency ≥ 0.5W Audio distortion ≤ 10%   launch Frequency range American version: UHF 420-450MHz; Very high frequency 144-148MHz; EU version: UHF 430-440MHz; Very high frequency 144-146MHz; Output power