Retekess TW106 Drive Thru Intercom System Why choose TW106 intercom system？ The host and extension adopt high-power speakers, which are louder and clearer than other window intercom;The only all-black walkie-talkie system, stylish appearance;Use detachable conference microphone, more high-end;Support for external microphones, wireless window intercom can be realized by connecting wireless microphones;Support recording monitoring and microphone sensitivity adjustment. Retekess TW106 Intercom System for Business Audio output for recording Record conversations and reduce conflictsUniversal 3.5mm interface, which is cooperate with recording equipment 360° arbitrary adjustment Extra long stainless steel hose microphone barrelCan be bent arbitrarily, no dead endsIt can stay firm and not loose after years of use Volume adjustment 2 volume adjustment buttons2 mute buttonsEasy to control the incoming and outgoing sound Enjoy Wireless Freedom Package Includes:1 x TW106 window intercom host1 x TW106 External speaker1 x Power adapter(US plug)1 x TT123 Wireless mic headset1 x Double head USB charging cable1 x 6.35mm converter1 x English user manual TT123 Wireless Microphone Headset A lot of noise？ Installation environment noise performance is poor, or too much other noise, you should make the distance larger between the host and the outside speaker or adjust the volume (“I-v” and “O-v”) downIf the volume knob to the minimum, the speaker volume is still very big, please adjust the microphone sensitivity knob (“I-v” or “O-v”) at the bottom of the host Can't hear the sound? The AC adapter is not plugged in or looseThe 4-core connecting cable is not plugged in or looseVolume is not adjusted:Adjust the volume button (“I-v” and “O-v”) on the host to loud“+” How is the sound quality? High-power output, high-quality speaker diaphragm;Output high-fidelity sound quality, delicate and clear;Strong sound penetration and loud volume.Other question？Q:Do you have an extension wire for the speaker outside?A:Yes, the package is 1.8m, and longer extension cords such as 5m.8m.10m can be customized.Q:What is the working voltage?A:It support 100-240V.