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Designed by extreme prison environments, the telephone adopted a robust stainless steel shell,with the anti-corrosion coating enclosure.
It is adapt to harsh conditions such as high humidity,moisture, dust,shock, vibration,saltwater, and physical abuse.
The vandal-proof series telephone is specifically designed for environments prone to vandalism,providing reliable communication for locations such as parking lots, prisons, airports, railways, metro stations, ATMs, platforms, hospitals, police stations, shopping malls, and stadiums.

| Basic Features | |
| Waterproof Rate | IP54 |
| Noise cancellation | Optional |
| Full-duplex communication | Support |
| Enclosure Material | Cold-rolled casing Powder coating treatment Outdoor UV protection |
| Color | Sliver ( default) |
| Handset material | ABS+PC, stainless steel armored telephone cable |
| Keypad | Full keyboard with metal material |
| Power supply | 12V DC /POE |
| Power consumption | Idle 1W / Working 2.4W |
| Working temperature | Operating temperature: -40°C to + 70°C Storage temperature: -40°C to +75°C |
| Mean Time Between Failures | More than 50,000 hours |
| Analogue Features | |
| Communication distance | 3km |
| Signal Level Standard Frequency | Low Frequency Group: 697-941 Hz High Frequency Group: 1209-1477 Hz Frequency Deviation: No more than ±1.5% Level Difference Between Low and High Frequency Signals: 2 ± 1 dB Total Distortion Due to Harmonic Intermodulation: At least 20 dB lower than the basic level |
| Wiring Method | Twisted pair telephone line |

Maritime

Highway / Tunnel

Railway

Power - Station

Mining industry

Industrial park
| Package | |
| Unit size | 250*160*123 (mm) |
| Packaging materials | corrugated box, pearl cotton lining |
| Weight | Net weight : about 3 KG / Gross Weight :4 KG |