SVBONY SV192 Lens warmer protects the lens of your camera or telescope before freezing and fogging. Perfect for taking pictures overnight or morning in somewhere with high humidity. SV241 Astronomy Power adapter is a hub specifically designed for astronomical imaging and an invaluable assistant for shooting the starry sky. It integrates a plethora of power and data interfaces, featuring exceptional industrial design and hardware protection functionalities. SV241 power hub is a Practical astrophotography equipment! Equipped with USB 2.0 port&Type-C port, powers astro gear like equatorial mounts and guide cameras. 2 USB ports share power output; for dew heaters—keeping optics clear and your astrophotography sessions uninterrupted under the night sky.