Intelligent Architecture
Constant Able™ PTT
Mini GCAI (M16)
The most capable, broadly compatible Push-to-Talk for two-way radios on the market. Developed with SRT and SWAT operators to tackle the toughest interoperability challenges.
Auto-Sensing
The Intelligence Core
Push-to-talks aren’t just an accessory—they’re the core of comms. The Constant Able uses embedded proprietary algorithms to decide, rewire, and adjust gain within 100ms.
Microphone Support
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✓Dynamic (Low Impedance / Mil-Spec)
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✓Electret (High Impedance / Civilian)
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✓150 Ohm Variants
Wiring Handling
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✓US NATO Standard
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✓Peltor Wired (EU Standard)
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✓No switches. No reprogramming.
Radio Interface: Motorola Mini GCAI
This is a true Mini Ground Connector Accessory Interface (Mini GCAI)—not an adapter, and not a workaround. This is the "Small APX" format.
Engineered for Direct Integration:
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APX N70 (Firmware R05.00.00+)
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APX N50, N30 (Firmware R35.00.00+)
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MOTOTRBO Ion Smart LTE
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R7 Series
Proven Compatibility
Field-proven with professional comms gear:
Peltor Comtac II–VIII
Ops-Core AMP
MSA Sordin
OTTO NoizeBarrier
N•Ear 360
Connectors: U-174/U (NATO J11) or U-384 (Dual Comm Split Audio*) — If your headset downlead has red rings, you will require the TP-105 O-ring.
Mission Specs
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⚡ Zero batteries required
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🌊 IP67 Sealed (Waterproof/Dustproof)
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🛡️ Integrated hot mic shroud
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🔄 Rotating ambidextrous clip
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🇺🇸 Buy American Act Compliant
Compatibility Note
DISCUS pairing: DISCUS requires a dynamic (low-impedance) microphone. You can run DISCUS in-line with Constant Able when the headset mic is dynamic. If your headset uses an electret or amplified boom mic, use Constant Able alone — DISCUS will not drive those mics.
If the downlead on your headset has red rings, you will require the TP-105 O-ring as an addition to this PTT. Red rings typically indicate the U-384 (Dual Comm Split Audio*) configuration.
Compatible radios (Mini GCAI)
Built for the Mini GCAI accessory interface used on these manufacturer radio models:
- APX N70
- APX N70 XE
- APX N50
- APX N30
- MOTOTRBO R7
- MOTOTRBO Ion
- MXP600
- MXP660
Platform names: Mini GCAI, GCAI mini, APX N series, MOTOTRBO R7.
Constant Able PTT with auto impedance sensing for dynamic and electret headsets. No batteries required. Match by physical plug and radio model—not third-party chart codes alone.
