This plug and play module lets you turn on the monitor speaker of any 1000/2000/3000 series telephone while continuing to use the handset. Perfect for training and sales environments. Allows for the trainee to speak on the handset while the supervisor monitors the complete conversation. Installing the PI-TGL disables the ability to use the HHEU and DSVU.

*Modular design

*Externally mounted

*No external power required

*Volume control adjustable

*Made with pride in the USA