The SFE SD300 is a professional, compact, and cost-effective dual-mode digital and analogue handheld transceiver. Built using the DMR Tier II / TDMA standard, it serves as an affordable entry point for businesses migrating from legacy analogue systems to highly secure digital networks. This non-display model is widely popular across industrial operations, warehousing, security teams, and logistics.
| Dual-Mode Operation with Auto-Detect | Supports both digital and analogue operation. Mixed-mode functionality automatically detects the incoming signal type, allowing the radio to work seamlessly alongside existing analogue and newer digital radio fleets. |
| Dual Capacity Direct Mode (DCDM) | Uses two-slot TDMA technology to support two communication paths on a single 12.5 kHz frequency in direct mode, increasing channel capacity without requiring a repeater. |
| Advanced Digital Audio & Noise Suppression | Digital voice processing and error-correction technology help maintain clear, intelligible audio in noisy working environments and towards the edge of radio coverage. |
| Digital Voice Encryption | Supports digital voice encryption to help protect sensitive radio communications and reduce the risk of unauthorised monitoring. |
| Remote Fleet Management | Supports Remote Monitor, Stun, Kill and Activation functions, providing greater control over lost, stolen or compromised radio units within a compatible digital radio system. |
| One-Touch Emergency Protocol | A dedicated emergency function allows users to quickly transmit a priority alert to compatible radios or dispatch systems when immediate assistance is required. |
| Detailed Specifications | |
| Frequency Variations | VHF Model: 136–174 MHz UHF Model: 400–470 MHz / 400–480 MHz |
| Digital Protocol | ETSI TS 102 361-1, -2, -3 (DMR Tier II compliant) |
| RF Transmit Power | VHF: 5W High / 1W Low UHF: 4W High / 1W Low |
| Channel Capacity | 32 to 64 programmable channels divided across 2 zones |
| Digital Vocoder | AMBE++ |
| Channel Spacing | Analogue: 12.5 kHz / 25 kHz Digital: 12.5 kHz |
| Battery Configuration | 7.4V DC / 2000 mAh Lithium-Ion (Li-Ion) battery pack |
| Environmental Protection | IP54 rated for protection against dust and splashing water |
| Audio Output Power | 750 mW internal audio output (up to 3W maximum burst speaker protection) |
| Dimensions (H × W × D) | 108 mm × 53 mm × 31.5 mm (excluding antenna) |
| Weight | Approximately 215g |
| Good to Know | |
| SD300K Display Variant | For applications requiring a display, text messaging, contact-list selection and visible zone information, the SFE SD300K offers a 1.8-inch LCD screen and expanded capacity of up to 1024 channels. |
| USB-C Charging | Newer SD300 battery configurations support convenient USB-C charging, providing greater flexibility when charging radios in the field without relying solely on a desktop charging cradle. |
