哪款视频婴儿监视器在价格、功能和用户评价之间提供了最佳综合表现？
| Product ⇅ | Price ⇅ | 分辨率 (pixels) ⇅ | 帧率 (frames per second (fps)) ⇅ | 夜视 ⇅ | 云台/倾斜/缩放（PTZ） ⇅ | 双向音频 ⇅ | 电池寿命 (hours) ⇅ | 覆盖范围 (feet) ⇅ |
|---|---|---|---|---|---|---|---|---|
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eufy Baby Monitor E21 (S340)
US
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£194.88 ≈ | 4K UHD | — | ✓ | ✓ | ✓ | 5000mAh 电池 ~9小时（夜视时约5.5小时） | 1000 ft (开放环境) |
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The eufy Baby Monitor E21 features a 4K UHD camera with 330° pan, 60° tilt and 8× zoom, infrared night vision, two-way audio, and a 5,000mAh rechargeable camera battery for portable use. It supports hybrid monitoring (with or without Wi‑Fi), local encrypted recording, smart alerts (cry/noise/temperature), and a 5‑inch parent display with split‑screen support. This suits parents who want high-resolution, flexible monitoring for home and travel. ★ 适合人群非常适合寻求性价比与功能评估平衡的买家，因为它提供 4K 分辨率、330° pan/60° tilt/8× zoom、本地加密录制，以及可提供约 9 小时便携使用的 5,000mAh 电池。 |
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