Hytera SM08M3 Remote Speaker Microphone for TC-580 / PD502i / BD552i Series
The SM08M3 is the OEM remote speaker microphone for Hytera TC-508, TC-580, PD502i, BD552i, and compatible BD5 / PD4 / PD5 series portable radios. It uses a 2-pin connector with a locking screw to hold position during active use. The built-in 3.5mm audio jack supports a receive-only earpiece — useful in high-noise environments where the speaker output alone is not sufficient.
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Why Professionals Choose the Hytera Hytera Speaker Mic SM08M3
Fleet managers running BD502i or BD552i radios across a full 10–12 hour shift face one recurring problem: standard batteries that fall short around hour 9, right when handoff between teams happens. The BL1506 is rated for 16 hours of continuous runtime in digital DMR mode (5-5-90 duty cycle), which covers extended shifts in manufacturing, security, and campus operations without a midday swap.
The battery runs at 7.2V with 1500mAh capacity — 10.8Wh total — and is built to ≥500 full charge cycles before capacity drops noticeably. The IP54 rating protects against dust ingress and water splashing from any direction, which matters on loading docks, in food processing environments, or anywhere radios get wiped down with damp cloths during sanitation routines.
OEM construction means the BL1506 interfaces correctly with the BD5i and BD6i battery management circuit. Third-party batteries in this form factor often report inaccurate charge indicators on the radio display — a known issue with non-original cells that skip the handshake with Hytera's internal BMS. The BL1506 eliminates that variable.
AXDIGITAL is an authorized Hytera dealer supplying OEM parts to US enterprises
Specification
Audio — Remote Speaker Microphone SM08M3
| Type | Remote Speaker Microphone (RSM) |
| Connector Type | 2-pin Hytera with locking screw |
| Audio Jack | 3.5mm (receive-only earpiece) |
| Microphone Sensitivity | -40dB ±3dB @1kHz |
| Speaker Sensitivity | 92dB ±3dB @1kHz |
| Impedance | 16Ω ±15% @2kHz |
| Rated Power | 1W |
| Maximum Power | 2W |
| Clip Type | 360° swivel metal clip |
| IP Rating | IP54 |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
| Weight | ~140g |
FAQ
Is the SM08M3 compatible with Hytera PD502i and BD502i radios?
Yes. The SM08M3 is confirmed compatible with both the PD502i and BD502i series using the standard 2-pin Hytera connector. It also covers TC-508, TC-580, TC-610, TC-700, BD552i, BD612i, PD412i, PD482i, PD505, PD415, and PD562i. For large fleet orders or custom configurations, contact our team to verify compatibility for your specific model variant.
Is the SM08M3 compatible with other brands using the same 2-pin connector?
The SM08M3 uses a 2-pin connector specific to Hytera's TC, BD, and PD series radios. The pin spacing and locking thread on this connector are not interchangeable with Motorola, Kenwood, or Icom 2-pin accessories, even where the physical format looks similar. Use only with confirmed Hytera-compatible models listed above.
Is this an original Hytera speaker microphone or an aftermarket product?
The SM08M3 listed here is the original Hytera OEM part. AXDIGITAL is an authorized Hytera dealer in the USA — we supply OEM accessories only. Note that the SM08M3 has been discontinued by Hytera; the current replacement is the SM50M1. We carry SM08M3 while stock lasts.
