MIRA Safety VPU-1 Respirator Voice Projection Unit: Communicate Clearly in Critical Environments
About this product
IMPORTANT NOTE: Requires the 3.5mm jack version of the MIRA Safety Gas Mask Microphone (sold separately). Mic mounts on the respirator’s exhalation valve; VPU connects via 3.5mm jack.
Overcome Respirator Communication Barriers
The MIRA Safety VPU-1 Respirator Voice Projection Unit delivers clear, amplified voice communication while wearing gas masks or half-face respirators. Engineered for professionals operating in high-noise, hazardous, or CBRN environments, this IP67-rated device ensures your voice is heard without compromising PPE integrity. Built to withstand exposure to extreme temperatures, vibration, water, salt fog, and dust.
Key Features & Technical Advantages
- Enhanced Audibility: Projects voice at 83 dBSPL @ 1 meter (audio output power remains at its set level and does not decrease as battery life drops)
- Extended Operational Readiness: 6 hours continuous use with 2-hour recharge
- Ruggedized Design: IP67 certified (IEC 60529; submersible to 1 m for up to 30 minutes)
- Tactical Integration: MOLLE-compatible clip system
- Simple Tactile Control: Three-button interface with volume range (+24 dB to −80 dB)
- CBRN Compliant: Meets ČSN EN 140 standards
- Environmental Resistance: Operates in −20°C to 60°C (−4°F to 140°F)
Technical Specifications
Audio Performance
| Specification | Value |
|---|---|
| Frequency Response | 300 Hz – 3,400 Hz |
| Input Impedance (1 kHz) | 150 Ω ±10% |
| Maximum Audio Output Power | 3 W |
| Sound Pressure Level | 83 dBSPL @ 1 m (constant at set level across battery discharge) |
Power System
| Specification | Value |
|---|---|
| Battery Type | Lithium Polymer 3.7V / 1200mAh (4.44 Wh) |
| Operating Time | 6 hours (continuous use at max audio output) |
| Charging Time | 2 hours (from 0–100% with IIN up to 1.8 A) |
| Battery Charging Input | 4.65–5.5 VDC (designed for standard USB charger) |
| Cycle Life | 500 charge cycles |
Environmental Resilience
| Parameter | Range |
|---|---|
| Operating Temperature | −20°C to 60°C (−4°F to 140°F) |
| Storage Temperature | −20°C to 45°C (−4°F to 113°F) |
| Charging Temperature | 0°C to 45°C (32°F to 113°F) |
| Ingress Protection | IP67 (IEC 60529) |
| Additional Resistance | Vibration, water, salt fog, dust |
| Flame Retardant | UL 94 V2 (min. level) |
| Calculated MTBF | 1,000 hours |
Physical
| Attribute | Value |
|---|---|
| Color | Black (RAL 9005) |
| Weight | 150 g ±10% |
| Attachment | MOLLE clip |
| Dimensions | See technical drawing/diagram |
Critical Applications
- Tactical Operations: SWAT, riot control, and military CBRN scenarios
- Industrial Safety: Hazmat response, chemical processing, and firefighting
- Emergency Response: Any situation requiring clear voice communication through respirators
Superior Communication Solution
The VPU-1 amplifies natural voice projection, enabling real-time communication without requiring radio equipment for every listener—overcoming the limits of speech diaphragms and radio-only setups.
Optimized Deployment
- Connect: Plug 3.5mm microphone jack into VPU-1
- Test: Perform battery check and power on
- Mount: Secure via MOLLE clip to gear
- Adjust: Set volume to prevent feedback
Note: Acoustic feedback may occur if the VPU is placed too close to the microphone. Reduce volume or increase the distance to eliminate feedback.
Storage & Maintenance
- Store in a cool, dry place away from direct sunlight (−20°C to 45°C / −4°F to 113°F)
- Perform battery tests every 6 months during storage
- Maintain 40–60% charge for long-term storage
- Lithium batteries can typically hold a charge for up to 12 months in storage
Certifications & Compliance
- PPE Directive 89/686/EEC
- EMC Directive 89/336/EEC
- ČSN EN 140 (CBRN)
- UL 94 V2 (flame retardant)
Deployed by:
The United States
DEFENSE
The United States
HOMELAND SECURITY
The United States
BORDER PROTECTION
The United States
GUARD
The United States
CORRECTIONS
The United States
DEPARTMENT TX
The United States
The United States
DEPARTMENT
Portugal
INTERIOR
Ukraine
DEFENSE
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FAQs
Have a Question?
-
Are there any agency discounts offered?
Yes, please contact our sales department for agency discounts, whether for an individual or agency wide.
-
What is the standard lead time?
1-3 business days upon payment receipt.
