E3Jk-R4M1 Reflective Proximity Switch Sensor 3A Photoelectric Switch Sensor Ac Product Features HOW THE SWITCH WORKS: The Photoelectric Switch uses the test object to blocked or reflected beam by the synchronization loop gating circuit to detect the presence or absence of the object. PHOTOSENSITIVE COMPONENT: This Reflective Proximity Switch can detect all objects that can reflect light . FAR DETECTION DISTANCE: The Photoelectric Switch has designed with stronger photoelectric sensor, which comes with reflector, and the detection distance can up to 4m. VARIOUS ADVANTAGES SWITCH: This Photoelectric Switch has a small size, multi-function, long life, high precision, fast response, detection distance and anti-light, electricity, magnetic interference capability advantages. SURFACE MOUNT TECHNOLOGY: The Photoelectric Switch has taken Integrated circuit technology and SMT surface mount technology, and manufacture a new generation of optical switch devices, with delay, broadening,external synchronization, anti-interference, high reliability,working for regional stability and self-diagnosis of intelligent features. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!