・【Long-Range Reception】Achieves a direct line reception distance of up to 280m in open areas,ensuring reliable connectivity across large spaces ・【Adjustable Sensing Range】Features a customizable sensing distance of 2-7m,adaptable to various temperature conditions for optimal performance ・【Wide Detection Angle】Offers a 110° left-right sensing angle,providing comprehensive coverage for entrances and doorways ・【Customizable Alert System】Includes 52 selectable melodies,including 8 welcome messages,9 prompts,33 classic ringtones,and 2 emergency alerts ・【Adjustable Volume Control】Features five volume levels,including a silent mode with only light indication,catering to different environmental needs ・【Easy Setup】Receiver unit operates on standard 110/220V power,allowing for simple plug-and-play installation Specifications: ・Product model:M12 ・Material:ABS ・Receiving distance:280m straight line on open ground ・Sensing distance:2~7m (depending on temperature) ・Sensing angle:110° left and right ・Sensor power supply:battery power or power cord power (not included) ・Receiver power supply:plug in (110/220V) ・Volume level:five levels (adjustable only flashing light) ・Music selection:52 music (8 welcome words,9 prompt words,33 classic ringtones,2 emergency prompts) Note:The above parameters are provided by factory laboratory tests. Package included: ・1 x Transmitter ・1 x Receiver ・1 x Installation Kit ・1 x English User Manual