Norcon TTU-4 remove
Description: Part Number: TTU4 
The TTU-4 is ideal for communication between prisoners and guests through a glass barrier when partitions providing acoustical isolation between visitors and between inmates in available. If no acoustical barriers contact us for other options.The TTU-4 incorporates the same high-quality electronics as the basic patent pending TTU-1AX. The TTU-4 is designed for applications in security areas, all controls and microphones are recessed to minimize unauthorized adjustment and tampering.