Features: 1) Insulation resistance: ≥2 x 10,000mΩ/500V DC 2) Voltage strength: non-puncture, no arc-over under 15kV DC/1min 3) Environment: a) Environmental temperature: -25 ~ +55°C b) Relative humidity: below 85% (when the temperature is below 30°C) c) Atmospheric pressure: 70 - 106KPa 4) Usage and properties: a) Suitable for the protective connection between cables and pigtails b) Suitable for the connection between optical cables and optical communication device c) Small volume, unique structure, easy installation, for indoor use