PowerKit-15' feet: includes PowerCase & QuadCord-15' feet 4-in-1 USB Power Cord. A MUST HAVE for The BOOM! [4.5' to 8' GoPro Mount for 3/4" Seat Post on Your Boat] PowerCase is great for your GoPro 4, 3+, & 3) and QuadCord-15' feet has Standard to USB-C, USB-Micro, USB-Mini & Apple Lighting. PowerCase is similar to GoPro Skelton case that sells for $49.99. Open side allows for power/charging and allows sound to get in too. Much better sound than standard waterproof case to your GoPro. Dead batteries SUCK, but not with PowerCase, QuadCord-15' feet and The BOOM! Case protects 95% of your camera from water spray and dust. Check out out Silicone Rainproof Putty for full protection. (sold separately) ORDER NOW!