Feature:1. Easy To Install: This electronic eyepiece can be easily mounted on any optical telescope and microscope, which must have an eyepiece size between 25mm50mm and can be attached to the telescope equipment with a slight rotation.2. Built In WiFi: This WiFi microscope eyepiece has built in wifi, users can connect their cell phones to wifi hotspots for browsing and control, data transmission is not affected by network speed.3. 800mAh Battery: This WiFi telescope eyepiece is equipped with a 800mAh battery, which can support 4 hours of continuous operation while charging. And it is equipped with type C charging port, any cell phone charger can charge the device and support mobile power such as charging bank.4. 128GB Memory Card Supported: This WiFi telescope eyepiece camera supports 128GB memory card ( not included ), you can upload photos and videos from the memory card to your cell phone through the app.5. 4MP HD Lens: This electronic eyepiece camera features a 4MP HD lens and a 4:3 format sensor that supports up to 16 MP still photo and 2K super HD video recording, as well as timed and time lapse recording.Specification:Item Type: WiFi Electronic EyepieceCMOS, SENSOR Pixels: 4MPRecording Resolution: 2K, 1080PRecording Frame Rate: 30 Frames 1080, 25 Frames 2KPhoto Resolution: 1920 x 1080, 2304 x 1296Video Format: MP4Lens Horizontal Angle: 5Recording File Time: 1, 3, 5WIFI Point To Point: SupportMaximum Support Memory Card: 128GB (Not Included)Battery: Lithium Battery 800mAh x 1 (Included)Recording Time (wifi On): 130 Minutes.Package List:1 x WiFi Electronic Eyepiece1 x Manual