通过特殊的4 元配置，实现无方向性。
对于手，头等微小动作，有更高的检测能力。
Omni directional detection is archieved by unique quad element configuration. Highly sensitive to small movements of hands, heads etc.
用途 : 天花板安装侵入者报警器，照明器具等的自动开关
APPLICATION: Security Alarm (For Ceiling Mount Application); Automatic Lighting Switch
标准型号 Recommended model: SBG446-671
