eufyCam S4: Revolutionary Triple-Lens Bullet-PTZ Camera: A single groundbreaking device that replaces and outperforms separate bullet and PTZ cameras. The upper 4K bullet lens delivers a 130° fixed wide view, while the lower 2K dual-lens PTZ offers 360° smart tracking and zoom. Bullet-to-PTZ Tracking and Auto-Framing: Once the bullet cam detects a subject, the PTZ camera instantly locks on, tracks, and zooms in to capture details up to 164 ft away. When more subjects enter the frame, it automatically zooms out to ensure they all stay visible. Powerful Solar-Charging with SolarPlus™: Stay charged year-round with a 5.5W ultra-large solar panel and SolarPlus™ 2.0. Just 1 hour of direct sunlight a day keeps the camera running, and the detachable design makes setup easy and flexible.  Great on Its Own: eufyCam S4 can work independently—no HomeBase™ needed. It features on-device AI for smart human, vehicle, and pet detection. It comes with 32 GB built-in storage, expandable up to 256 GB via microSD (not included). Better with HomeBase™ S380: Unlock BionicMind™ AI to differentiate family from strangers. With 16 GB built-in storage, expandable up to 16 TB, rest easy knowing your videos are stored securely. If you already own a HomeBase™ S380, please make sure it’s updated to version V3.7.2.8 or later, and your eufy app is updated to the latest version to enable 24/7 recording and Snapshot features.*HomeBase™ 2(Homebase™ S280) , Homebase™ mini, Homebase™ Professional and eufy NVR are not currently supported. Precise Detection, Powerful Deterrence: Radar and PIR sensors deliver precise motion alerts with fewer false alarms. When a threat is detected within your set zone or schedule, red and blue warning lights and a 105 dB siren activate to deter intruders. Video Doorbell E340: Dual Cameras, Double Security: Two cameras work together to deliver advanced viewing. The front-facing camera focuses on people, while the downward-facing camera fills in the gaps with a view of the floor in front of your door. Color Night Vision for a Clear View : Introducing the industry's first dual-light system paired with an advanced light capturing and processing algorithm. Less blur than previous iterations of night vision and a clear nighttime viewing distance of up to 16ft (5m). See What Matters in 2K Full HD Clarity: 2K clarity reveals more details. Get clear and detailed visuals of your doorstep and anyone who drops by. Battery or Wired, Your Choice: Battery mode makes installation easy. Keep a spare quick-release battery for quick swaps and avoiding downtime due to charging. Wired mode is also powered by the battery, which is topped up by the wired power source for long-lasting performance. Note: Wired mode requires the battery to be installed and a power source power should be connected with 8 to 24V and >10VA.