Universal Compatibility: Fits any optical telescope or microscope with an eyepiece diameter of 30mm-50mm. Simply rotate to connect with your telescope or microscope. Built-in WiFi: Connect to the device's WiFi hotspot for easy browsing and control via your smartphone. High-Quality Imaging: Equipped with 2.5K high-definition video recording. Versatile Functions: Features include timed photography and time-lapse video recording. Long Battery Life: The built-in 1500mAh lithium battery supports 4 hours of video recording and expandable storage supports TF cards up to 128GB for ample storage space. Convenient charging with Type-C interface allows charging with any phone charger and supports power banks for extended use. This device is designed for seamless integration with optical telescopes and microscopes, providing users with high-quality imaging and versatile functionality. With built-in WiFi, users can easily connect and control the device via their smartphones. The long-lasting battery ensures extended use, making it perfect for both amateur and professional astronomers or microscopists. Color: Black Material: ABS Package Contents: 1*Telescope Eyepiece Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.