1.Two-way voice transmission automatic two-way intercommunication without pressing button suitable for two-way intercom between hospitals and clinic desk 2.Recording output jack teller intercom can be connected to external recording equipment automatically recognize the voice signal being processed during the call no need to take any measures 3.Clear sound quality window speaker intercom system brings clear and natural sound high-sensitivity microphone with anti-interference function 4.High power window speaker adopts high power input and output technology loud and clear sound RT-9908 intercom with a dedicated side tone processing chip 5.Flexible microphone neck the window microphone can be adjusted to a suitable angle according to the installation position and the user's height the microphone cable is 2m 6.Independent volume control internal and external volume of window speakert can be adjusted separately according to the environment 7.Simple installation turn on the power and press the switch the power indicator will remind you of the corresponding working status 8.Streamlined design window microphone with speaker has full metal shell beautiful appearance high-quality materials and components make the signal output perform well 9.Simple operation simple design of three buttons inner and outer volume adjustment knob and switch button easy operation even without manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.