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| Product ⇅ | Price ⇅ | Heart Rate Accuracy (%) ⇅ | Battery Life (hours) ⇅ | Water Resistance (meter) ⇅ | Screen Size (inches) ⇅ | GPS Accuracy (meters) ⇅ | Compatibility ⇅ |
|---|---|---|---|---|---|---|---|
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Amazfit GTR 4
US
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£119.19 ≈ | 总体准确，但在快速变化时存在几秒钟延迟；稳定后读数与胸带值相符 | 14 天（典型使用） | 5 ATM（50 meters） | 1.43 in | 改进的双频圆极化天线用于精确定位；通常 GPS 锁定能力强 | Android 7.0 及以上；iOS 12.0 及以上 |
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The Amazfit GTR 4 is a 46mm fitness-focused smartwatch with a 1.43 in AMOLED display, BioTracker 4.0 PPG heart-rate sensor, dual-band GPS, Alexa support, and up to 14 days battery life. It targets users who want long runtimes and robust fitness tracking at a mid-range price. ★ 适合人群适合想要准确腕式心率监测（BioTracker 4.0）且追求最长可达 14 days 电池续航，同时价格保持在 £200 以下的用户。 |
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Apple Watch SE 3 40mm
US
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£178.78 ≈ | — | 约 18 小时 | 50 meters | 1.57 in | — | 运行最新 iOS 的 iPhone |
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The Apple Watch SE 3 40mm is an entry-level Apple Watch with an Always-On Retina display, S10 chip, core fitness tracking including optical heart rate monitoring, safety features like crash detection, and swim-ready 50m water resistance. It suits users who want Apple Watch performance and safety features without advanced medical sensors like ECG or SpO2. ★ 适合人群适合预算有限的用户，因为它提供光学心率监测和约 18 小时的电池续航，且在促销时价格可能低于 £200，是寻求可靠心率追踪的高评分实惠选择。 |
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Polar Pacer
US
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£148.98 ≈ | Precision Prime GEN 3.5 光学心率；测量范围 15-240 bpm | 训练模式最多 35 h；手表模式最多 7 天；省电模式最多 100 h | WR50 | 1.2 in | 距离 ±2%；平均路线准确度 5m | Bluetooth 5.1；兼容 Polar Flow 应用（Windows、Mac、iOS、Android） |
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The Polar Pacer is a lightweight GPS running watch with Polar Precision Prime optical heart-rate sensing, a 1.2 in always-on MIP color display, multi-GNSS support and long battery life aimed at runners and multisport athletes. It provides core training metrics, sleep and recovery insights and simple smartphone connectivity without touchscreen complexity. ★ 适合人群适合寻找价格在 £200 以下、评价优秀的心率监测智能手表的购买者，因为它提供 Precision Prime 光学心率（15-240 bpm）、多 GNSS（距离 ±2%）以及最长可达 35 h 的 GPS 电池续航。 |
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