Hytera BD502i VHF DMR Digital Portable Two-Way Radio (VHF 136–174 MHz)
The BD502i VHF is a commercial DMR portable radio for outdoor operations — construction sites, campus grounds, outdoor event venues, parks, and large facilities where VHF at 136–174 MHz propagates farther across open terrain than UHF. At 5 watts with 48 channels and 16 hours of digital battery life, it covers outdoor crews through a full shift without repeater infrastructure on most single-site operations.
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Why Professionals Choose the Hytera BD502i (VHF)
The BD502i VHF runs at 5 watts across the 136–174 MHz band — one watt more than the UHF model, and the higher-propagation band for outdoor coverage. Construction sites coordinating crews across multiple buildings and open yard areas, outdoor campuses managing groundskeeping and security teams, event venues directing staff across parking and perimeter zones: all benefit from VHF's longer propagation distance over open ground and lower attenuation from rain and vegetation compared to UHF.
The 48-channel, 3-zone layout handles multi-team outdoor operations without workers needing to reprogram radios between roles. The dual analog/digital mode communicates with existing VHF analog fleets on site during transition — contractors often mix newer digital radios with legacy analog units across job sites, and the BD502i handles both without a separate bridge or gateway. IP54 protection and MIL-STD-810G compliance cover the rain exposure, dust, and drops that outdoor crews deliver to equipment daily.
Confirmed on the official Hytera US website (hytera.us), the BD502i includes Channel Voice Announcement — noted explicitly as a BD502i feature — which calls out the channel name or number audibly when the channel selector is turned. For outdoor workers wearing gloves, operating in bright sunlight where a display would be unreadable, or moving quickly between areas, audible channel confirmation reduces miskeying errors and keeps crews on the right channel without stopping to look at the radio.
Specification
General
| Frequency Range | VHF 136–174 MHz |
| Channel Capacity | 48 Channels (24 Analog, 24 Digital) |
| Zone Capacity | 3 Zones, 16 Channels per Zone |
| Channel Spacing | 25 / 12.5 kHz |
| Operating Voltage | 3.8V DC |
| Battery (standard) | 1500mAh Li-ion (BL1506) |
| Battery (optional) | 2000mAh Li-ion (BL2018) |
| Battery Life — digital (5-5-90) | 16h (1500mAh) / 22h (2000mAh) |
| Battery Life — analog (5-5-90): | 12h (1500mAh) |
| Operating Temperature | -30°C to +60°C (-22°F to +140°F) |
| Antenna Impedance | 50 Ω |
| Dimensions (H×W×D) | ~102 × 50 × 27 mm (4.0" × 2.0" × 1.1") |
| Weight (with BL1506 + antenna) | ~155g (5.5 oz) |
Transmitter
| RF Power Output | 5W (High), 1W (Low) |
| Digital Modulation | 4FSK |
| Analog Modulation | 11K0F3E @ 12.5 kHz / 16K0F3E @ 25 kHz |
Receiver
| Digital Sensitivity (5% BER) | 0.22 µV (typical) |
| Analog Sensitivity (12 dB SINAD) | 0.22 µV (typical) |
Compliance
| FCC Part 90 | Certified |
| IP54 | Confirmed — hytera.us (Tier 1) |
| MIL-STD-810 C/D/E/F/G | Compliant — shock, vibration, temperature, humidity |
FCC Licensing and Compliance Support
Operation of the Hytera BD502i VHF on licensed frequencies in the United States requires an FCC Part 90 license. This applies to commercial and business radio use across construction companies, outdoor facilities, campus operations, and event management organizations on private licensed VHF frequencies in the 136–174 MHz band.
As an authorized Hytera dealer, AXDIGITAL assists customers throughout the licensing process — from identifying VHF frequencies available for your site to preparing and submitting the FCC Part 90 application. VHF is the standard band for outdoor open-area operations. For organizations coordinating crews across multiple outdoor zones or job sites, we provide frequency coordination guidance to prevent inter-team interference.
The BD502i VHF is FCC Part 90 certified and complies with DMR digital and analog modulation standards. For outdoor teams transitioning from existing VHF analog fleets, we advise on frequency reuse and channel planning to keep both technologies running simultaneously during rollout.
Contact us to discuss licensing requirements for your organization.
FAQ
What is the outdoor range of the BD502i VHF?
At 5W VHF across 136–174 MHz, the BD502i covers approximately 2–4 miles in open terrain under typical conditions. VHF propagates farther over open ground and through vegetation than UHF, making it the standard band for outdoor and campus operations. Range varies with terrain and obstructions. For sites with dead zones or extended coverage needs, the BD502i supports DMR Tier II repeater systems. Contact our team for a site-specific estimate before ordering.
Will the BD502i VHF work with existing analog radios on the job site?
Yes. The BD502i operates in both analog and digital modes. Program it to your current VHF analog frequencies and CTCSS/DCS codes and it communicates directly with existing radios without a gateway. Automatic mode detection switches between analog and digital incoming calls. On mixed outdoor crews — where some workers carry older analog radios and new hires receive BD502i units — both groups stay on the same channel without separate radio management.
What is the difference between the BD502i VHF and BD552i VHF?
The BD502i VHF has no display, 48 channels, and a simpler form factor — suited for outdoor workers with fixed channel assignments who need a rugged, straightforward radio. The BD552i VHF adds a single-line OLED display, 256 channels, and optional Bluetooth — suited for supervisors or workers switching between multiple team channels. Both are 5W VHF with the same band and coverage. The BD502i is lighter and lower cost; the BD552i adds channel flexibility and status visibility.
