Check the listing for details. Extron Electronics 3.5 mm Stereo Audio Cable Power Sensor WITH Sensing Wire. Condition: Used. Listed at 11.35 USD. Extron Power Sensor Model Number: 33-449-01 This is a working unit, pulled from service in used, working condition. Signs of previous usage are to be expected. Scratches, superficial scuffs, etc. Sticky residue from the previous owner's asset labels are the be expected. Some units may have velcro attached to the top and/or bottom. The unit will come, as you see depicted in the photographs. Includes sensor wire. Due to postage costs and fees, "Best Offers" will only be considered on multi-unit purchases. Free domestic shipping will be provided by the United States Postal Service. International shipping is available via USPS Priority International or the GSP. Feedback is left automatically by the system upon you leaving feedback for us. Please be sure to ask any and all questions BEFORE making your purchase. Any and all returned merchandise will be subject to a 20% restocking fee.