- Independent volume control; unique dynamic sound indicator; inside and outside volume knob can separately adjust the volume
- 2m extension cable with metal sleeve; 6.5ft connection line between the main unit and auxiliary unit; more reasonable to install with stainless steel wire protection tube
- Easy to install; just to make a small hole of about 0.7 inches in the glass; connect the external machine cable to the host through the small hole
- Voice resources input; connect the signal input port to computers, mobile phones and other devices; broadcast information for customers
- Two-way voice intercom communications technology; automatically identify the processing speech signals during a call; window speaker doesn’t require any action
