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Gp 638 Plus


The Motorola GP638 Plus keypad radio, is one of the toughest from Motorola Professional Series to date. Rated IP67* dust-tight and water submersible, the radio is also resistant to knocks and drops. Lightweight and compact, the GP638 Plus has received Factory Mutual (FM) Approval and meets Military Standard (MIL) 810C,D, E and F.

The GP638 Plus offers a versatile two-way solution for those who require additional features to meet their expanding communication needs. Whether you are in the rugged environment of the surveillance industry or in rescue operations, the GP638 Plus is the radio of your choice.


Advanced Audio Technology

  • Motorola’s voice compression and low level expansion technology enable crisp, clear and loud audio, keeping communications lines clear during critical missions


  • Meets Military Standard (MIL) 810C, D, E and F
  • The GP638 Plus conforms to stringent Factory Mutual (FM), making it suitable to operate in hazardous environments such as petrochemical and manufacturing plants

14-Character Alpha Numeric Dot Matrix display

The 14-character alpha numeric display allows immediate communication of vital information such as PTT ID, radio strength indicator and signal strength indicator. In addition, the user-friendly icons make the information easy to read and understand. The keypad and display illuminations also provide the needed visibility to operate your radio in the dark.

Received Signal Strength Indicator

An easy to read on screen display indicator notifies users of signal strength in their vicinity.

Name & Tone Tagging

The capability of assigning 8 different ringing tones and visual caller IDs to 8 specific users/talkgroups enhances audio and visual caller identification for these groups.

Battery Strength Indicator

Easy to read on-screen LCD display indicator alerts users on low battery strength.

128 Channels

Provides up to a maximum of 128 channels, allowing greater flexibility in organising different work groups.

Menu Keys

The easy to navigate menu keys allow users to select the relevant functionalities at their fingertips.

Dual Tone Multiple Frequency (DTMF) Encode

Allows users easy access to local landline telephone networks or to make a private calls to other radio system users from one radio.

Dual Priority Scanning

Allows activity on different channels to be monitored, and 2 channels can be designated as priority channels which are monitored more frequently.

Performance Characteristics
Battery life (standby)
10 hours at 5:5:90 cycle with LiIon (Hicap) battery at High Power, 13 hours at 5:5:90 cycle with LiIon (Hicap) battery at Low Power
Frequency range
136 – 174 MHz/ 330 – 400 MHz/ 403 – 470 MHz/ 450 – 527MHz
Physical Characteristics
Dimensions H x W x D (with standard battery)
101.5 mm x 56.5mm x 37mm
Emergency button
Weight (with standard battery)
320 gms (with LiIon battery)