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• The TTU-4 Talk-Thru communication system is particularly suitable for low ambient noise environments that require an unobtrusive, yet tamper-resistant voice communication system.
• 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-1.
• Because the TTU-4 is designed for applications in security areas, all controls and microphones are recessed to minimize unauthorized adjustment and tampering.
   

• The TTU-4 comes ready to operate, simply mount the prism units on opposite sides of the barrier. Tamper-resistant screws are used for both units. The prism units can be positioned back-to-back or in any other configuration suitable for your environment. Cables may either be run through a small hole in the barrier, or under the countertop.
• All Talk-Thru systems are shipped complete with mounting hardware, instructions, and power supply.

• Clear, 2-way hands-free voice communication
• No gooseneck microphone and no external controls
• Rugged, tamper-resistant materials
• Simple, one-person installation
• No need to cut a hole in the barrier
• Compact, contemporary design that fits any decor
• Export models available with 220VAC
• One year warranty on base unit (optional two years extended warranty available)
   

• Outside assembly: Machined aluminum, anodized finish, tamper-resistant
• Inside assembly: Machined aluminum, anodized finish, tamper-resistant
• Size (both assemblies): 2 in. H x 12 in. W x 2 in. D.
• Weight: 2.5 lb
• Mounting: Counter-top
• Panel controls: No external controls
• Electronic Specifications
• Audio frequency response: Selectively shaped for maximum voice intelligibility.
• Audio power: 2 watts per amplifier
• Distortion: Less than 2%.
• Listen mode: 20 dB compression
• Talk mode: Vox
• Microphones: Electret
• Power supply: Input: 120 VAC, 60 Hz Output: 15 VDC, 175 mA
• Specifications are subject to change without notice.