Amazon.com : GoPro Dual HERO System for HERO3+ (Camera not included) : Electronics
GoPro Dual HERO System Housing – An Extraordinary 3D Camera Rig – The Stereoscopy Blog
GoPro Hero4 Dual Battery Charger
GoPro HERO10 (Hero 10) Black with Deluxe Accessory Bundle: 3x Replacement Batteries, Dual USB Charger, Underwater LED Light with Bracket, Water Resistant Action Camera Case, & Much More - Walmart.com