Universal Wi-Fi Spotting Scope Camera. Universally mounts to a variety of scopes and features live steaming HD video. Features: Universal spotting scope Wi-Fi cam Live streaming HD video Universally mounts to wide array of existing spotting scopes (1 to 1-1/2 inches diameter eyepiece) Rechargeable lipo battery (estimated 1500 mAh for 8 to 10 hr battery life) Micro USB charging port Power button with low battery indicator Compatible with current bullseye app