This 4MP High Clear WiFi Electronic Eyepiece is a universal fit for any optical telescope or microscope, transforming them into powerful cameras for capturing stunning photos and videos of your observations. Features: Universal Compatibility: Fits any optical telescope or microscope with an eyepiece diameter of 28mm-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 a 4MP sensor, it supports up to 4MP static photos and 2K high-definition video recording. Versatile Functions: Features include timed photography and time-lapse video recording. Long Battery Life: The built-in 800mAh lithium battery supports 3 hours of video recording. Expandable Storage: Supports TF cards up to 128GB for ample storage space. Convenient Charging: The Type-C interface allows charging with any phone charger and supports power banks for extended use. Tips: This pair of goggles does not contain a telescope. You only need to screw the eyepiece onto the telescope, adjust the angle of the telescope, and watch on your phone through the APP. How to use: Twist the outer ring of the eyepiece to adjust the size of the inner ring. The inner ring can be adjusted to 30-49mm in diameter. The inner ring of the eyepiece can be adjusted according to the diameter of the telescope. Put the WiFi eyepiece on the telescope, tighten the inner ring to fix the telescope, turn on the WiFi connection, and then watch it on the mobile phone APP Specifications: CMOS/SENSOR pixels: 4 million Recording resolution: 2K/1080P Recording frame rate: 30 frames 1080/25 frames 2K Photo resolution: 1920X1080/2304X1296 Video format: MP4 Lens horizontal angle: 5 Recording file time: 1/3/5 WIFI point-to-point: Supported Maximum supported TF card: 128GB Battery (lithium battery): 800 mAh Recording time (WIFI) turned on: 130 minutes Language: Supports all languages ??and mobile phone synchronization Color box size: 93x93x63mm Full set weight: 140g Package List: 1 x 4MP WiFi Electronic Eyepiece 1 x User Manual