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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,bank, ATMs, platforms, hospitals, police stations, shopping malls, and stadiums.

| Basic Features | |
| Waterproof Rate | IP65 |
| Enclosure Material | Stainless steel casing Powder coating treatment Outdoor UV protection |
| Color | Orange ( default) |
| Communication mode | Full duplex |
| Handset material | ABS+PC, stainless steel armored telephone cable |
| Keypad | Without |
| Power supply | DC 12 V-24V/1.5A |
| Power consumption | Standby:1.5W, Working power: 1.8W (excluding amplification) |
| 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 |
| VoIP Features | |
| Protocol | SIP 2.0(RFC3261) |
| Registration line | 6 lines at same time |
| Codec | G.711A/u, G.7231 high/low, G.729, G.722,G.726 |
| Echo cancellation | Support G.168, Hands-free :max 96 millisecond |
| Network | 10/100 Mpbs WAN/LAN: Support bridge mode Support virtual LAN Support stun NAT penetration |

Maritime

Highway / Tunnel

Railway

Power - Station

Mining industry

Industrial park
| Package | |
| Unit size | 240*100*150 (mm) |
| Packaging materials | corrugated box, pearl cotton lining |
| Weight | Net weight : about 3 KG / Gross Weight :4 KG |