Check the listing for details. BOGEN ANS501 Ambient Noise Sensor with Microphone & Power Supply. Condition: New – Open box. Listed at 94.99 USD. ebay template chatsend eBay message Ask a Question BOGEN ANS501 Ambient Noise Sensor with Microphone & Power Supply Open Box, unused - come with Manual and what's shown in picture - please ask any questions before purchasing, see link to manufacturer's page HERE ANS501 • Automatically adjusts paging level as ambient noise levels rise and fall • Supports up to 4 small sensor microphones (1 ANS500M included) for large areas • Sensor microphones can be located up to 2,000 feet from control unit • Easily connects in at pre-amp out -power amp in process loop • Input/output: 600-ohm balanced, unbalanced The Bogen Ambient Noise Sensor system is designed to monitor continuously changing ambient noise levels and electronically adjust the level of a page announcement and/or background music so intelligibility is maintained. The system consists of the control module (Model ANS501), a microphone module (ANS500M), and a power supply. The system ensures that page announcements and music are audible even during periods of high noise levels by continuously monitoring the ambient noise level through a microphone module located in the subject area and adjusting the paging signal level into the system’s amplifier. BRANDBogenMODELANS501MPNB001CM4FT2 zoom_inClick for more PAYMENTS PayPal is accepted Credit Cards processed through PayPal ONLY! Alternative payment methods are available at buyer's request. SHIPPING & HANDLING Most items shipped out within 1 business day of payment clearance. Domestic/USA shipping via FedEx or UPS. Small items shipped via USPS. Bulky items (over 150 lbs.) will be shipped via domestic trucking/freight service. This item is also eligible for pickup unless otherwise stated, 6% Maryland Sales Tax will be added. NO FREE SHIP to AK, HI, PR & Other remote US territories - please use calculated service instead or send exact address for quoteInternational Customers - contact me - for shipping costs. International/WorldWide shipping via FedEx International Economy or UPS at our discretion. Small items maybe shipped via USPS. Import & custom duties, VAT, taxes, entry charges, clearance and/or brokerage fees are not included in the item price and/or shipping costs. These charges are always buyer's/importer's responsibility. Protect Your Product With a Consumer Priority Service Warranty