Choose your preferred security setup with ENER-J's Flexi Wireless or Wired Video Doorbell. No Monthly Fees & No Hub Needed. Get instant alerts on your smartphone, wherever you are, as soon as anyone rings the doorbell. This smart doorbell offers a unique square viewing angle and a wide 110-degree field of view, ensuring you see visitors from head to toe or spot packages on the ground. Enjoy the flexibility of dual-power options - either use the built-in rechargeable battery or connect it to existing wiring for continuous power.