This intercom adopts high performance electro-acoustic circuit technology<br> the output power up to 3W<br> anti-interference and noise reduction<br> makes voice clear and loud<br> <br> Inside and outside have separate speaker and microphone<br> microphone volume and sensitivity can be adjusted separately<br> <br> Two-way communication window intercom<br> identification and automatic processing of audio signals<br> no need to press any button<br> easy to operate and convenient to use<br> <br> The microphone line outside is 187cm<br> more convenient and easy to install and use<br> Microphone not only transmit sounds clearly<br> the height also could be adjusted according to your needs<br> <br> Sturdy and durable<br> with thick metal panel<br> scratch resistance<br> applicable to banks<br> at order points<br> at the counters<br> at toll stations<br> at bus stations to keep a safe social distance