POWERKit-15" USB-Mini: 1) POWERCase & 2) POWERCord-15': A MUST HAVE for The BOOM! [4.5' to 8' GoPro Mount for 3/4" Seat Post on Your Boat] This kit comes with POWERCase (GoPro 3, 3+ & 4) + a 15 foot POWERCord [USB-Standard to USB-Mini for GoPro 3, 3+ & 4 action cameras. Does not work with GoPro 5 or 6. 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/POWERCord-15' and The BOOM! Case protects 95% of your camera from water spray and dust. Check out out Silicone Rainproof Putty for full protection. ORDER NOW!