通過特殊的4 元配置，實現無方向性。
對于手，頭等微小動作，有更高的檢測能力。
Omni directional detection is archieved by unique quad element configuration. Highly sensitive to small movements of hands, heads etc.
用途 : 天花板安裝侵入者報警器，照明器具等的自動開關
APPLICATION: Security Alarm (For Ceiling Mount Application); Automatic Lighting Switch
標準型號 Recommended model: SBG446-671
