51SL ES Series Portable RadioSee All Portables

51SL ES Series

51SL ES Series Portable Radio

Public safety users need a radio that is rugged, reliable and solid. That's where EFJohnson comes in. The 51SL ES Series is a radio that meets the needs of first responders. Specifically designed for public safety, the 51SL ES Series offers crisp and powerful digital audio with the AMBE+2 P25 Vocoder, Project 25 trunked and conventional operation, and a sleek ergonomic design. It provides a seamless evolution to next generation networks while offering investment protection for your present communications system. Make the 51SL ES Series Portable Radio your right choice.

Product Sheet


Project 25 Compliance: P25 Common Air Interface (CAI), P25 trunked and conventional communications, P25 Data, and P25 Over-the-Air-Rekeying (OTAR) functionality are all supported.

SMARTNET® II and SmartZone® Trunking Protocols: EFJohnson is the industry's only supplier licensed to support both analog and digital SMARTNET II and SmartZone trunking protocols. ASTRO® trunking is also supported.

AMBE+2 Vocoder makes it the loudest digital radio available on the market today. Click here and hear the difference!

Submersibility Option: 1 meter, 30 minutes

Full Mil Spec 810F Compliance

Encryption: Ask about our free Single Key DES-OFB encryption for P25!

Multiple Configurations:

  • Model I (no display or keypad)
  • Model II (display, basic keypad)
  • Model III (display, DTMF keypad with enhanced backlit display and backlit keypad)

Extensive accessory suite including: Lithium Ion battery (lighter and thinner than NiMH batteries, and lasts 12 hours), rapid battery charger (charges a portable radio battery in an hour), a line of Tri-Chemistry chargers (capable of charging NiCad, NiMH and Lithium Ion batteries), speaker microphones, carrying cases, and more.

Additional Product Information

Follow the link below to send us your request for more information about this product.

Important Product Information

Encryptions (Non-FIPS certified):

  • DES


  • P25 Conventional
  • P25 Trunking
  • SMARTNET/SmartZone
  • Support Key Elements of MDC 1200


  • 700/800 MHz
  • VHF
  • UHF