contacta STS-K021 Window Mounted System Installation Guide
contacta STS-K021 Window Mounted System Specifications STS-K021 (Non-Ballistic Rated) STS-K022 (UL 752 Level 3 Ballistic Rated) STS-K023 (UL 752 Level 8 Ballistic Rated) Product Using Instructions Window intercom systems provide assistance for clear communication where normal speech is impaired by…