1、WiFi Function: Electronic eyepiece with WiFi function, no need to plug in cables when in use, simply connect to its WiFi hotspot from your phone to browse and control the eyepiece.(Note: This eyepiece is only suitable for 0.98in‑1.96in/25mm‑50mm monocular or binoculars or microscopes or astronomical telescopes) 2、Portable and Easy to Carry: Adjustable fastening rotary ring makes it can be compatible with 0.98in‑1.96in/25mm‑50mm monocular, binoculars, microscopes and astronomical telescopes. Use our camera to shoot your favorite birds or animals. 3、Supports Maximum 128GB: Supports up to 128GB memory card(not included), 1080P HD video recording to meet your shooting needs. Whether traveling, hiking, or exploring the great outdoors, this eyepiece camera is your perfect companion for capturing stunning moments on the move. 4、Easy to Use: Scan the code to download the app, easy and convenient to use, the phone can quickly connect to the app to view the screen after the eyepiece is turned on. 5、Long Battery Life: 1200mAh large capacity battery for long lasting use, no need to worry about power. Using the type C interface, any mobile phone charger can charge the device and support external power supply access, such as a power bank, which is convenient for long term use.