Maztech Rail-Mounted Remote 8in Black. Mounts to standard Picatinny rail. The X4 Rail-Mounted Remote plugs into the I/O Accessory Port on either the X4-FCS or the X4-LRF. Use the 3-button keypad to facilitate control of your X4 device from virtually any tactical position. The rugged ODU breakaway connector ensures a solid connection under weapon fire.? Specifications for Maztech Rail-Mounted Remote: Manufacturer: Maztech Color: Black Size: 8 in Features of Maztech Rail-Mounted Remote Tactile response on button click Designed to meet MIL-STD-810 environmental specs Compatible with both X4-FCS and X4-LRF Rugged breakaway I/O Connector Package Contents: Maztech Rail-Mounted Remote T15 Torx wrench Installation instructions Maztech MZT004-08-S-BLK: Rail-Mounted Remote 8in Black