Intelligent Architecture
Constant Able™ PTT
Hytera 13-Pin (H4)
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: Hytera 13-Pin (H4)
Direct-connect 13-pin interface for Hytera PD and HP series portables.
Compatible Models:
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PD6 Series (PD600, PD602, PD662, PD680, PD685)
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X1 Series (X1p, X1e)
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HP Series (HP602, HP682)
- TD560
H3 vs H4: Hytera uses two different multi-pin connectors. The H4 (13-pin) fits the PD6xx/X1/HP series above. If your radio is a PD7xx, PD982, or PT580, you need the H3 (16-pin Hytera) connector instead.
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
Not compatible with DISCUS. DISCUS is designed exclusively for dynamic microphones. Constant Able supports electret and amplified systems with full automatic switching.
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.
Mission Add-ons
Looking for the legacy option? The U-94/A Hytera H4 provides basic push-to-talk without auto-sensing — available in dynamic or electret variants.
DISCO32 Tactical Antennas — Aberdeen, NC
Designed & Manufactured by DISCO32 • 1-Year Warranty
