Feed Entities Podcasts Deep Dives Developers About

[KongchangAI]

Real-time AI knowledge base. Every claim is traceable to its source, with data freshness under 24 hours.

Powered by 240+ first-hand AI sources

Knowledge

Feed
Hot Entities
Podcasts

Developers

CLI
MCP Server
REST API
About

© 2026 KongchangAI. The freshest, most accurate AI knowledge

Unverified78% confidenceFactTime unknown

主流433MHz呼叫器空旷通信距离标称200-500米，实际穿1堵实墙有效距离通常降至标称的1/3左右

1

Sources

78%

Confidence

Long-term

Relevance

-

First Seen

Sources

Related Entities

传菜呼叫器category

Related Claims

Unverified无线接收型提示器的有效距离标称值需按实际打折，穿一堵承重墙衰减约50%，跨楼层建议选标称≥100米的433MHz型号而非低功耗蓝牙型号85% similar Unverified餐厅面积＜300㎡且单层布局，选择通信距离标称300米（空旷）的433MHz呼叫器即可；因标称距离通常是空旷环境，穿墙后衰减50%以上，实际有效距离约150米84% similar Unverified2.4GHz无线领夹麦标称传输距离多为100-250米，但那是空旷无遮挡数据；实际室内隔墙或人群环境有效距离通常缩水到15-30米，采访场景优先看抗干扰而非标称距离84% similar Unverified无线母子机传输距离在室内通常标称50-100米，但隔墙隔层会大幅衰减，实际有效距离约为标称值的1/3至1/281% similar Unverified标称传输距离是空旷无遮挡数据（如厂商写的300m/800m），室内隔墙实际有效距离通常打3-5折，选购时按标称距离的1/3估算实际可用范围80% similar

Cite This Claim

Stable URI

https://kongchang.com/claim/420037

API

curl https://kongchang.com/api/v1/knowledge/claims/420037

MCP

get_claim(id=420037)