1. disconnection protection: When the current reaches the disconnection value, the long shaped handle automatically pops-open to cut off the power supply, generally short-circuit situation jumped open, and so on after the troubleshooting, and then the long shaped handle back to the position to form a pathway. 2. manual disconnection: we need to disconnect the circuit in the modification, directly the oval red button on the insurance, then the long-shaped handle automatically pops-open and cut off the power supply. Connect the same as above, and then the long handle back to the position Colour:As Shown Material:alloy Package Contents: 2 x Photovoltaic Audio Resettable Fuse Circuit Breaker 20A 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.