KNG-P400S UHF 380-470 MHz



Awesome Because:

  • Flex Mode APCO P25 digital and Analog in one radio.
  • 512 Channels.
  • 12+ hours of operation on a single charge.
  • Light weight, yet built BK tough!
  • Easy operation.
  • Intuitive Programming.
  • Many accessories available.
  • Great features on a budget radio.
  • Powerful 5 watt transceiver.
  • Crisp clear audio.
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KNG S portable radio | P25 Digital Portable Two-way Radios

Meet the KNG Series digital portable radio. The one radio that works as long and as hard as you do – in the same mission critical situations as you do. Compliant with APCO Project 25 specifications, the KNG Series assures uninterrupted interoperability across frequencies, different groups of responders and variation in terrain.

Advanced Features

1-6 Watts RF Power Output

Extend the radio’s reach with up to 6 Watts of signal clarity. High and low settings are programmable by channel for power efficiency.

512 Channels

32 Groups with 16 Channels per group.

100 Programmable Quick Call ID’s

Connect with select radio users easily and ASAP through RELM’s Quick Call function.

Busy Channel Selections

Designed to indicate and prevent interference on active channels.

Channel/Priority/Dual Mode/Group Scan

Find an available channel for communications: scan by channel, priority channel, or scan by groups, one group at a time. Dual Mode Scan allows you to simultaneously scan conventional and trunked radio systems.

Problem Prevention Features

The Keypad lock prevents you from accidentally hitting a button that may activate functions unintentionally.

Birdie Free

Only RELM Wireless goes the extra mile to create a truly birdie free radio, which means there are no blacked out frequencies on our portable.

DVSI AMBE+2 Version 1.60 Vocoder

The version 1.60 Vocoder provides improved RF performance in a variety of degraded signal conditions. It also provides enhanced audio signal conditioning which improves system performance in the presence of background noise.

Superior Audio Quality

The KNG comes equipped with a 1.6” diameter speaker, giving you the loudest and clearest sound with the least distortion.

Long Battery Life

The KNG works as long as you do, putting in 12+ hours of reliable communication everyday. Upgrade to the KAA0101, a compact 3600 mAH battery and boost your battery life to 16+ hours.

Custom Programming

Our intuitive menu system and feature set is fully customized to fit your everyday needs.

Waterproof IP67 Rating

Dust tight and waterproof - the KNG Portable is especially designed to withstand 30 minutes of water immersion at 1 meter depth.


The KNG Portable has gone through rigorous testing and meets or exceeds military requirements.

APCO Project 25

The KNG Portable meets or exceeds APCO P25 standards.

Large LCD Display

Day or night, get all the information at a glance with our bright 13 character, 5 line LCD Display.

Field or USB Programmable

Ease of use. The KNG can be programmed via USB port on virtually any PC.

Talk Around

This feature allows you to bypass or “talk around” a repeater for a direct connection.

Emergency Signaling

KNG series radios support emergency calls and emergency alarms at the touch of the orange button.


Wireless Tactical OTAR

With RELM’s Wireless Tactical OTAR (WTO), you are provided with the flexibility to upgrade encryption keys wirelessly and effortlessly without ancillary equipment, infrastructure or key management facilities. WTO operates radio-to-radio and is completely contained in the KNG radio units, which means no additional equipment is required beyond initialization.

Multicast Vote Scan

Multicast Vote Scan capable KNG Series radios automatically select the best site to operate from in a wide area system. Channels in the multicast conventional system are added to the scar list and designated as “voted” channels. The KNG Radio scans all voted channels and selects the channel with the best signal.

AES/DES/OFB Encryption

AES and DES (Digital Encryption Standard) allows you to communicate with other radios that have the specific key programmed. RELM’s AES/DES Encryption is NIST certified, validated FIPS 140-2 Type III encryption with a 256 key load.

More Information
Long Name KNG-P400S Digital APCO P25, UHF 380-470 MHz, 512 Channels, 5 Watt, Full Keypad - RELM BK Portable Radio
Product Name KNG-P400S UHF 380-470 MHz
Manufacturer BK Technologies
This Product Replaces The Following SKUs No
Frequency Range (Band) No
# of Channels 512
Grade Public Safety
Technology APCO P25 Digital
Transmit Power 5 Watts
Screen Type LCD
Water Rating No
Buttons On Faceplate Field Programmable Keypad (DTMF)
Programming Options Clone, Keypad (direct entry), PC Computer
Trunking No
GPS Enabled No
Encryption AES/DES Optional
Explosive Environment Rating Not Rated
CMD Feature Set No

Radio, Manual, Side Port Cover



Frequency Range 380 – 470 MHz
Channels 512
Battery Life (up to) 12+ Hours
Zones (up to) 32
Operating Voltage 10 V
Channel Spacing 12.5/25 kHz
Channel Increments 12.5 kHz
Operating Temperature -30 °C to +60 °C
Dimensions (W x D x H) 2.5 x 1.8 x 5.5 in
Weight w/ Battery 16 oz
Standby Current Draw 85 mA


Sensitivity: 12db SINAD -119 dBm
P25 Sensitivity: 5% BER -119 dBm
Adjacent Channel Rejection 78 (67) dB
P25 Adjacent Channel Rejection 60 dB
Spurious and Images 80 dB
Intermodulation Rejection 75 dB
Audio Response +1dB / -3dB
Audio Distortion 1 %
RX Current Draw 160 mA


RF Power 5/4/1 Watts
Frequency Stability 1.5 ppm
Modulation Deviation 5 (2.5) kHz
Audio Distortion 3 %
FM Hum and Noise 50 (45) dB
Spurious and Harmonics 75 dB
Current Draw @ High Power 1500 mA
Audio Response +1 db / -3 dB
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