Unverified85% confidenceDecision RuleTime unknown
选购前确认无线频段：国内合规民用报警设备多用433MHz或2.4GHz，433MHz穿墙能力强、覆盖广（空旷可达百米），2.4GHz带宽高但穿墙衰减快，别墅多楼层优先选433MHz主机+子设备
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85%
Confidence
Long-term
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Unverified无线主机选择433MHz或Sub-1GHz频段的穿墙能力优于2.4GHz，别墅/复式结构建议单主机可接≥32路无线探头并支持中继扩展90% similarUnverified无线报警主机的传感器无线频段优先选用433MHz或Sub-1GHz，穿墙能力和抗干扰性明显优于2.4GHz，别墅或复式户型尤其应避免仅支持2.4GHz的机型89% similarUnverified无线探测器优先选433MHz或Zigbee而非私有2.4GHz协议，433穿墙能力强适合大户型多墙体，2.4GHz易被WiFi干扰且穿透差82% similarUnverified屏蔽效能优先看频段匹配：家用WiFi/手机（0.7-6GHz）选屏蔽值≥30dB（衰减99.9%）即可，5G毫米波及工业微波环境需≥60dB（衰减99.9999%）的镀银或不锈钢纤维材质81% similarUnverified无线延迟与覆盖距离存在权衡：使用2.4GHz穿墙强但抗干扰弱延迟高，5GHz延迟低速度快但隔墙衰减严重，同房间共享优先5GHz，跨房间选双频80% similar
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