ATEX Zone 1 / 21 Certified 5G Radio


COMING Q2 2024

Introducing the IS440.1 – the ultimate communication solution for secure and faultless Push-to-Talk over Cellular (PoC) functionality. With its cutting-edge 5G radio technology, this device guarantees uninterrupted communication using public or campus networks (4G or 5G) or Wi-Fi® in Ex-Zone 1/21 environments.

Our IS440.1 sets itself apart by offering numerous advantages to enhance your communication experience. Designed with user convenience in mind, it features a user-friendly interface, ensuring effortless navigation and ease of use. The replaceable battery ensures long-lasting operation, allowing you to stay connected for extended periods without interruptions.

Featuring large buttons specifically designed for Push-to-Talk (PTT), SOS, and talkgroup selection, the IS440.1 simplifies and streamlines the communication process, ensuring quick and efficient communication in critical situations. Additionally, its powerful front speaker guarantees crystal-clear audio, ensuring clear and effective communication even in noisy environments.

But that’s not all. The IS440.1 also offers an ISM interface and a functional fixing clip, enabling seamless integration into existing systems. This device is fully interoperable with previous radio technologies, thanks to its gateway, providing a smooth transition from older systems to this advanced solution.


Key Features

  • Channel selector e.g. for PTT applications
  • Programmable red key (e.g. for lone worker protection/SOS)
  • Programmable side key (e.g. for PoC/PTT)
  • Additional programmable buttons, M1 & M2, assignable via Button App
  • 8-pin ISM interface for optional audio accessories
  • Powerful 4800 mAh for extreme runtime as an optional accessory
  • Amplified loudspeaker for noisy work environments
  • Integrated belt clip for safe carrying
Accelerometer, Gyroscope, Magnetic,
Pressure Sensors
SIM (Nano-SIM + eSIM)
USB-C, Desktop Charger, Multi Charger


ATEX Certification

II 2G Ex ib IIC T4 Gb
II 2D Ex ib IIIC T135°C Db

IECEx Certification

Ex ib IIC T4 Gb
Ex ib IIIC T135°C Db

Operating system ISM-OS
Processor Qualcomm® QCM6490 Octa Core
Memory 4 GB RAM
64 GB internal memory
Frequencies 4G LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12 MFBI/B13/B14/B17/B20/B25/B26/B28/B29/B30/B66/B68/B71
4G LTE-TDD: B38/B39/B40/B41/B42/B43/B48
5G NR: n1/n2/n3/n5/n7/n8/n12/n14/n20/n25/n28/n30/n38/n40/n41/n48/n66/n71/n77/n78/n79
Dimensions Size: 136,62 x 71,5 x 32 mm
Weight: 322 g
Display 2,4″ (6,096 cm) Corning® Gorilla® Glass V3
Battery 2400 mAh
Camera 8 MP AF front
Connectivity Wi-Fi® 6: IEEE 802.11 a/b/g/n/ac/e/k/r/ax/v with hotspot
Bluetooth® 5.2
GPS, A-GPS, Glonass, Beidou, Galileo, NavIC, QZSS, SBAS
Near Field Communication
Types of protection IP68 dust-/waterproof


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