Four inch diameter aluminum anodized two-way electronic talk thru provides amplified clear voice communication. Standard model has gooseneck microphone for operator and plugs into 115 volt duplex outlet for continuous duty. Battery pack is available for D 
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Draft-free 11" diameter cast aluminum talk thru is meant for exterior installations. This model is a larger version of our No. 8-D. No. 11-D Talk Thru is adjustable for glazing from .25" to 1.875" thick. Optional spacer ring is requ 
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Draft-free 8.375" diameter cast aluminum talk thru is well suited for exposed application. Natural voice transmission is obtained through the tensed clear plastic diaphragm while eliminating air flow. Perforated clear security screen on customer side 
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Five inch diameter cast stainless steel talk thru with vertical louvers provides natural voice transmission. No. 5-D Talk Thru is available for interior or exterior use (specify which) 
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Round 6" diameter cast stainless steel talk thru design offers natural voice transmission with evenly spaced louvers. This unit is available as interior or exterior model (specify which). 
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Five inch diameter stainless steel talk thru has offset slots in front and rear to provide natural voice transmission. No. 5-FR Talk Thru is available as interior or exterior model (specify which) and fits glass from .25" to 1.25" thick. 
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Six inch diameter stainless steel talk thru has offset holes in front and rear to provide natural voice transmission. No. 6-FR Talk Thru is available as interior or exterior model (specify which). It fits glass from .25" to 1.875" thick. 
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