This is the Scubapro M2 Cradle Download Accesory Cable for M2 Computer Features: Allows use of Scubapro LogTRAK software Helps download dives to PC Provides viewing of all aspects of dive Designed for Scubapro Mantis 2 dive computer With this cradle you can download your dives to a PC or MAC laptop or desktop computer. The process is easy and lots of fun.