SV241 Pro Astronomical Telescope Photography Power Management Box is a compact, durable power solution with 5 DC outputs, USB ports, and PWM channels for cameras, heaters, and sensors; Suitable for nighttime observation and astronomical photography. Our SV241 Pro Power Management Box's system offers static electricity protection, reverse connection and backflow prevention, plus USB 3.0 and DC filtering. Fuse, voltage, current, and short-circuit protections ensure stable power, while intelligent detection and auto-restart keep devices safe and running smoothly. SVBONY SV238 Off-Axis Guider(OAG) delivers precise,reliable astrophotography performance. Direct connection to deep-sky cameras with M2.5 holes (noticed back focus). You can also connect to filter drawers (SV226 M54&SV226P);Compatible with ZWO/ToupTek New motorized filter wheel(with screw holes). SV238 connects to cooled cameras with 2 methods:1.Direct connection to M2.5-hole cameras with self-provided extension tube/T-Ring is required to achieve 55mm back focus 2.Connection via filter drawers/filter wheels(with holes); confirm compatibility by hole parameters in SV238 mechanical drawings.