Color a Black Applicable model a WAVE 2 a WAVE 3 The component can be used to fix WAVE and its add-on battery on a horizontal surface in environments prone to shaking and bumpy use (e.g., RVs, yachts, etc.). It is recommended to add a wooden board to the mounting plane to avoid damage caused by drilling. Please check the screws and strap connections regularly to avoid loosening due to bumps.