Feature: 1. Allow you to mount two cameras on a tripod. Replacement for GoPro HERO3+ and HERO4. 2. Enable you to put a LED video light and action camera together, delivering excellent video in the dark. 3. Mount adapter replacement for GoPro, fits its monopod, head strp, chest mount harness, etc.. Specification: Features: Allow you to mount two cameras on a tripod. Replacement for GoPro HERO3+ and HERO4. Enable you to put a LED video light and action camera together, delivering excellent video in the dark. Mount adapter replacement for GoPro, fits its monopod, head strp, chest mount harness, etc.. Made of premium quality material, not easy to crack or break, it is sturdy and durable. Note: *Only the mount adapter is included, other accessories like thumbscrew and monopod are not contained. Specifications: Material: ABS Color: Black Item Size: approx. 9*2*2.1cm / 3.4 * 0.8 * 0.8in Package Weight: 35g / 1.23oz Packing List: 1 * Mount Adapter Package List: 1 * Mount Adapter