The Wheelock E70 Wall and E90 Ceiling Speakers and Speaker Strobes are designed for high efficiency sound output for indoor applications. The E product line features intelligible communications with crisp, clear voice messages and tone signaling, ideal for mass notification, and voice evacuation. Providing a sleek aesthetic appearance, The Eaton Wheelock Series E High Speaker Strobes feature dual voltage (25/70 VRMS) capability and field selectable taps from 1/8 to 2 watts. The low profile design incorporates a speaker mounting plate for faster and easier installation. Each model has a built-in level adjustment feature and an aesthetic two (2) screw grille cover.Features Approvals include: UL Standard 1971, UL Standard 1480, New York City (MEA), California State Fire Marshal (CSFM), Factory Mutual (FM) and Chicago (BFP) See approvals by model in Specifications and Ordering Information ADA/NFPA/ANSI compliant Complies with OSHA 29 Part 1910.165 Wall mount models are available with Field Selectable Candela Settings of 15/30/75/110cd or 135/185cd (Multi-Candela models), or 1575cd (Single Candela model) Ceiling mount models are available with field selectable candela settings of 15/30/75/95cd or 115/177cd (Multi-candela models) Strobes produce 1 flash per second over the regulated voltage range 24 VDC with wide UL “Regulated Voltage” using filtered DC or unfiltered VRMS input voltage Synchronize with Wheelock SM, DSM or Wheelock PS-24-8MC Power Supply with built-in sync protocol Field selectable taps for 25 or 70 VRMS operation from 1/8 watt up to 2 watts High efficiency design for maximum output at minimum wattage across a frequency range of 400 to 4000 HZ Fast installation with IN/OUT screw terminals using #12 to #18 AWG wires