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LEX-4

LEX-4

LEX-4 Field Brief

Device Designation: LEX-4

Manufacturer: LangSec Dynamics

Catalog Reference: SERA Equipment Catalog, Item No. LEX-4-290

Device Overview

The LEX-4 is a compact, ruggedized field translator used by SERA personnel during off-grid and multilingual operations. Designed for rapid, situational translation in high-stress environments, it delivers real-time voice and text conversion across 300+ languages without the need for Wi-Fi or cellular service.

It can interpret spoken words, printed text, and signage, with on-screen displays and audible playback in the user’s preferred language. Translations are presented with a built-in confidence indicator to assist agents in quickly gauging accuracy during time-sensitive missions.

Operating fully offline using onboard AI and local language models, the LEX-4 is a mission-critical tool in areas where network-dependent apps are unreliable or compromised. Prioritized for resilience, uptime, and operational security, the LEX-4 trades polish for grit—built not for convenience, but for survival.

Key Features

  • Instant Translation: Real-time translation of 300+ languages (spoken & written)
  • Rugged Design: Waterproof, shockproof, dustproof—built to survive extreme conditions
  • Offline Functionality: Fully functional without Wi-Fi or cellular networks
  • Data Transfer: Share files via USB-C, wireless, or proprietary connector

Proprietary connector supports field charging, data transfer, and tech updates via special adapter (Catalog No. LEX-4-ADP)

  • Connectivity:

– Cellular: LTE, 3G, 5G

  • LTE/3G Range: 5–10 miles (rural), up to 30 miles (line-of-sight)
  • 5G Range: 1–2 miles (urban)

– Satellite: Iridium network for global communication

– Mesh Network: Secure short-range communication with FR 72 Field Repeaters

  • Encryption: AES-256 for data and 4096-bit RSA for secure key exchange
  • Controls:

– Four-way keypad for menu and map navigation

– Action Button for quick access to translation or mission log

– Context Button for adaptive commands

– Customizable Keys for field agent preferences

• Charging: USB-C, Qi wireless, magnetic charging, and proprietary connector—all dust and waterproofed

Physical Specs

  • Display: 5.2” OLED, ruggedized and glove-compatible touchscreen
  • Weight: 290 grams (10.2 ounces)
  • Dimensions: 145mm x 80mm x 25mm
  • Housing Material: Rubberized polycarbonate blend for grip and shock absorption
  • Screen Material: Mineral glass for enhanced shatter resistance
  • Operating Temperature: -20°C to 60°C (-4°F to 140°F)

Power and Charging

  • Idle / Off Mode: Up to 30 days of battery retention when powered off
  • Translation Mode (offline): Up to 72 hours of continuous use
  • Cellular Use:

– LTE/3G: Up to 20 hours

– 5G: Up to 12 hours

  • Satellite Use (Iridium): Up to 24 hours with 5% duty cycle
  • FR 72 Mesh Operation: Up to 48 hours under silent transmission protocol

– Device only transmits when required, enters RF-silent standby to avoid detection

  • Charging Methods:

– USB-C for data and power

– Qi wireless pad charging

– Magnetic charging backplate

– Proprietary 4-pin connector for rugged field charging and data link

Connectivity & Field Communication

  • FR 72 Field Repeaters

– Seamless short-range mesh integration

– LEX-4 direct range: 5–10 miles (line-of-sight)

– Mesh coverage: Up to 50 miles when repeaters are daisy-chained

– Radio Frequency: UHF band (400–512 MHz)

  • RF Security

– Mesh mode uses burst transmission and silent idle windows to minimize RF signature

– Helps prevent detection and triangulation from RF sniffers

Encryption & Security

  • AES-256 encryption for stored data and live communications
  • 4096-bit RSA for secure key exchange
  • All transmission channels locked with military-grade encryption

Additional Features

  • Voice Control: Supports hands-free translation commands and navigation
  • Custom Mission Profiles: Operator-defined presets for task-specific field roles
  • Mission Logging: Captures timestamps, geolocation data, and log entries automatically

Proprietary Connector

  • Functions: Charging, data sync, and firmware updates
  • Adapter Spec: Catalog No. LEX-4-ADP
  • Design: Waterproof, dustproof, with exposed contacts for field reliability

Deployment History