Its locking system is superior to the standard non-lockable MAIN connector Lockable 20A/250V AC device coupler Linear, uncharged and pre-grounded three contacts Fast and convenient rotary locking system Ergonomic design Fireproof, flame retardant. Power plug, is the key! Name:Power set connector PA66 grade, environmentally friendly Electrical parameters: Contact resistance (internal):less than equal ohms Dielectric strength (external):4/2.8 Kvac Insulation resistance: 0.1G ohm Electronic contact:2P+E Rated current:20A Rated voltage:250V Mechanical parameters: Cable diameter:5-12 (mm) Service life: 1000 (based on the number of connections) Type:OutPut Colour: Material:Plastic Package Contents: 10 * Socket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.