1,This auto switch fuse holder is easy to install, can be installed on any flat panel or wall 2,Possess over current protection, over voltage protection, residual current protection, overcharge protection 3,Come with waterproof protective plastic cover, which guarantees operation safety 4,The fuse holder support automatic detection and manual recovery, practical and useful 5,Mainly used in the modification of audio‑visual systems such as automobiles, ships, trucks, etc., and can also be used in other circuit safety protection systems Item Type: Circuit Breaker Model: HT-608 Material: Copper, phenolic plastics Operation Method: Electronic Input Voltage: DC12-24V Stud: 1 or 4in-28 Operating Temperature: -32℃-82℃Mainly used in the modification of audio‑visual systems such as automobiles, ships, trucks, etc., and can also be used in other circuit safety protection systems Optional Style: 50A, 60A, 80A, 100A, 150A, 200A, 250A, 300ASize: Approx. 2.8 x 7.9 x 4.8cm or 1.1 x 3.1 x 1.9in 1 x Circuit Breaker Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.