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Cooper Wheelock < Products < Mass Notification < SAFEPATH®4 SP-SVC Supervised Volume Control      Mass Notification Products Safepath 4: - Safepath 4 Overview - Addressable Paging Splitter & Telephone Zone Controller - SAFEPATH Audio Boosters - Series NPS Push Stations - Remote Microphone - SP4-LOC Remote Microphone and Local Operator Console - SP-SVC Supervised Volume Control - SP4Z-A/B 2-Zone Class A or 4-Zone Class B Speaker Audio Splitter - LEMD - EMNA SAFEPATH®4 Multi-Function Mass Notification System SAFEPATH®4 SP-SVC Supervised Volume Control Allows manual volume setting for telephone paging and background music for a specific speaker or speaker zone.     Available features and options: Supervised volume control for use with UL Listed Life Safety Applications Can handle up to 35 watts of 70.7 volt audio power input Adjustment settings: 0 – 10, in 3dB increments Operates in Class B or Class A wiring (for Class A, the SP4-APS is required) Mounts to a double gang, 3½” deep back box or 4” square and 1-1/2” deep box with a 1-1/2” extension ring and a double gang mud ring Stainless steel mounting plate with a black knob UL Standard 864 and California State Fire Marshal (CSFM) listed for use with the SP40S, SP40/2 or SPB Audio Boosters OSHA 1910.165 and ADA compliant