GAI-Tronics Handset/Speaker Amplifier with Pressbar, 24V DC & Magnetic Hookswitch The 701 sequence handset/speaker amps are an important part of the 700 Series Page/Party program. GAI-Tronics Page/Party interaction techniques offer paging and party-line abilities two important way of interaction features in one resilient, easy-to-operate program. Through the page function - with appropriate speaker location - individuals can be approached anywhere in your organization. For further interaction, the good thing about this function is that it allows two or more individuals to discuss without being heard over the audio speakers. These handset/speaker amps are plug-in amps that friend immediately with the Style 702, 703, 732 and 733 Series Firm Enclosures and are appropriate for outside or inside use. It can be operated at various temperatures. Features: Energetic, noise-canceling microphone Reading aid appropriate per FCC Aspect 68 receiver Heat variety range (Operating/Storage) -22 to +158 F (-30 to +70 C) Dimensions: Behind section - 8.1" H x 8.1" W x 3" D in. (20.6 x 20.6 x 7.6 cm) Front side of section - 8.1" H x 8.1" W x 3.5" D in. (20.6 x 20.6 x 8.9 cm)