This kit contains: Power Supply: 2 amp plug top switched mode digital power supply (transformer) suitable for powering 40 12 volt dolls house type bulbs. 1.8 m output lead fitted with standard 2.1 mm male plug. Connectors: (Connectors have a self adhesive backing) 2.1 mm Female socket to screw terminal block 12 Way fused connector strip with ON/OFF switch 6 Way fused connector strip with ON/OFF switch 3 Way connector block with wired connecting plug