The SFE SD300K is a professional-grade, dual-mode digital handheld two-way radio designed on the DMR Tier II / TDMA platform. Upgrading upon the base non-display SD300 model, the SD300K integrates an LCD display and full keypad to accommodate comprehensive text messaging, advanced system telemetry, and a significantly larger channel matrix. It is heavily utilized across security squads, commercial logistics, heavy machinery industries, and event operations.
| 1.8″ Colour LCD Display & Physical Keypad | Features a clear 1.8-inch colour LCD display for viewing text messages, contacts, zones, channels and radio settings. The backlit keypad provides convenient access to direct dialling, channel selection and programmable menu functions. |
| Intelligent Mixed-Mode Auto-Detect | Supports both digital and analogue operation, with mixed-mode functionality that automatically detects the incoming signal type. This allows the radio to operate alongside both existing analogue equipment and newer digital radio systems. |
| Advanced Fleet Management | Supports DMR fleet management functions including Remote Monitor, Stun, Kill and Activation, providing administrators with greater control over lost, stolen, unreturned or compromised radios. |
| Flexible Contact Calling | Supports Individual Calls for private radio-to-radio communication, Group Calls for selected teams or departments, and All Calls for wider fleet communication. |
| Digital Voice Encryption | Supports digital voice encryption to help protect sensitive communications and reduce the risk of unauthorised monitoring of digital radio traffic. |
| SMS Text Messaging | Supports the sending and receiving of text messages between compatible radios, providing an alternative communication method when voice communication is impractical or needs to remain discreet. |
| Wireless Configuration Cloning | Wireless Clone functionality allows compatible radio configurations to be copied from a master radio to other units, simplifying the deployment and configuration of multiple handsets without requiring individual programming cables. |
| Detailed Specifications | |
| Frequency Coverage | VHF Version: 136–174 MHz UHF Version: 400–470 MHz / 400–480 MHz |
| Digital Signalling Platform | ETSI TS 102 361-1, -2, -3 (DMR Tier II compliant TDMA) |
| Channel & Zone Capacity | Up to 1,024 memory channels across 64 programmable zones Certain firmware configurations may support a reduced active channel layout |
| RF Transmitter Power | VHF: 5W / 1W selectable UHF: 4W / 1W selectable |
| Channel Spacing | Analogue: 12.5 kHz / 20 kHz / 25 kHz Digital: 12.5 kHz |
| Battery Configuration | 7.4V DC / 2000 mAh Lithium-Ion (Li-Ion) rechargeable battery pack |
| Privacy Tone Framework | DTMF, 50 CTCSS tones and 104 DCS/DQT groups |
| Receiver Sensitivity | Analogue (5% SINAD): 0.20 µV Digital (5% BER): 0.20 µV |
| Audio Output | 750 mW internal audio output (up to 3W peak handling) |
| Dimensions | 108 mm × 53 mm × 33 mm (excluding antenna) |
| Weight | Approximately 250g |
| Environmental Protection | IP54 rated for protection against dust and splashing water Factory-customised configurations may be available with protection up to IP66 |
| Good to Know | |
| Dual-Slot TDMA | DMR TDMA technology supports two separate communication paths within a single 12.5 kHz radio channel when used with a compatible repeater system, increasing available communication capacity. |
| Voice Recording | Built-in voice recording functionality allows supported transmissions to be recorded for later playback and review, providing a useful reference for operational or incident follow-up. |
