--- product_id: 942518 title: "Ademco 5820L | Honeywell 5820L Wireless Slimline Contact" brand: "honeywell" price: "€ 136.28" currency: EUR in_stock: true reviews_count: 11 url: https://www.desertcart.gr/products/942518-ademco-5820l-honeywell-5820l-wireless-slimline-contact store_origin: GR region: Greece --- # Compatible with desktop & laptop security setups Wireless slimline design for seamless integration Battery-powered for flexible placement Ademco 5820L | Honeywell 5820L Wireless Slimline Contact **Brand:** honeywell **Price:** € 136.28 **Availability:** βœ… In Stock ## Summary > πŸ”’ Slim, smart, and wireless β€” security that fits your lifestyle. ## Quick Answers - **What is this?** Ademco 5820L | Honeywell 5820L Wireless Slimline Contact by honeywell - **How much does it cost?** € 136.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/942518-ademco-5820l-honeywell-5820l-wireless-slimline-contact) ## Best For - honeywell enthusiasts ## Why This Product - Trusted honeywell brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Effortless Installation:** Battery-powered and wireless means zero wiring hassleβ€”set it up quickly and start protecting your home instantly. - β€’ **Sleek Wireless Security:** Ultra-slim profile blends effortlessly with any door or window frame, keeping your space secure without the bulk. - β€’ **Universal Compatibility:** Works seamlessly with desktops and laptops, making it perfect for both home and professional environments. - β€’ **Trusted Brand Reliability:** Honeywell’s proven quality ensures your security system performs flawlessly, backed by thousands of satisfied users. - β€’ **Top-Ranked Security Sensor:** Ranked #1,834 in Home Security Systems, this sensor is a proven bestseller that savvy homeowners trust. ## Overview The Ademco 5820L | Honeywell 5820L Wireless Slimline Contact is a battery-powered, wireless security sensor designed for easy installation and seamless integration with desktop and laptop security systems. Its slim profile and trusted Honeywell brand make it a top choice for modern home and business security, boasting strong customer ratings and bestseller status. ## Description Ademco 5820L | Honeywell 5820L Wireless Slimline Contact OPEN BOX ## Features - Ademco 5820L | Honeywell 5820L Wireless Slimline Contact OPEN BOX ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B001VS2CEC | | Best Sellers Rank | #1,834 in Home Security Systems | | Brand | Honeywell | | Compatible Devices | Desktop, Laptop | | Connectivity Technology | USB Cable | | Customer Reviews | 4.4 4.4 out of 5 stars (112) 4.4 out of 5 stars | | Item Weight | 1.76 ounces | | Manufacturer | Honeywell | | Mfr Part Number | 5820L | | Model Number | 5820L | | Number Of Batteries | 1 AAA batteries required. | | Number Of Items | 1 | | Number Of Packs | 1 | | Power Source | Battery Powered | | Unit Count | 1 Count | | Upc | 781410826571 | ## Product Details - **Compatible Devices:** Desktop, Laptop - **Power Source:** Battery Powered - **Brand:** Honeywell - **Connectivity Technology:** USB Cable - **Number of Batteries:** 1 AAA batteries required. ## Images ![Ademco 5820L | Honeywell 5820L Wireless Slimline Contact - Image 1](https://m.media-amazon.com/images/I/41wmIeBWSzL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great little sensor! *by on Reviewed in the United States March 27, 2016* When we bought our house, the previous owner hadn't kept the security system maintained. Several doors had contact sensors hanging off the frames, and a few wires were pushed up into the doorframe. I've been resurrecting the complete security system over the last week or so, but I didn't want to take the door trim off, fish out the wires, re-hang the trim, etc, etc. These slimline wireless sensors aren't *that* much larger than the wired versions. Yes, they're larger. Yes, they're a little more noticeable. But they're wireless and allowed me to fix the couple of doors where the wires had gone bad without taking my walls apart. That's worth it, in my book.I installed my own panel, so I had my panel's master codes. To add these to your system, you will either need to contact your installer, or you will need to have the installers codes to program the panel (and the know-how to use them) yourself. If you're reasonably experienced with "Do it yourself" projects, this is not difficult. It took me about 30 minutes of research online to figure out how all consumer-grade security panels work and about an hour of reading the programming manuals to work out how to program mine.The honeywell panel (with the newer keypads) makes adding these into the system a breeze. You just set the zone type, tell the panel it's an RF sensor, and then separate the magnet and transmitter a couple of times to auto-enter the serial number. From that point on, it "just works". You should make sure to test your sensors in the location you want to install them before you tape or screw them to your door, but I have a rather large house, and these worked fine when the receiver (my RF keypad) was on the first floor on one side of the house, and the sensor was in the basement on the opposite side of the house. I live in a pretty remote area, though, with almost no RF interference, so your milage may vary.Bottom line, I love these sensors, and I'll buy them again as I need more. ### ⭐⭐⭐⭐⭐ These work well on double pane windows using rare earth magnets. *by on Reviewed in the United States February 11, 2016* I've had 3 of these develop what appear to be tamper switch problems (i.e., the tamper switch triggers an alarm when there is no tampering. I fixed this by putting 1 or 2 layers of tape on the ridge the keeps the tamper switch down. .I use these on my PVC double pane windows sills. I glue rare earth magnets to the top pane and stick this thing on the lower pane (and ditch the magnet it came with) so that it alarms no matter which part of the window gets opened.They are pricey, but they look much better than the bigger ones. Plus, these don't require me to drill into my new vinyl windows. ### ⭐⭐⭐⭐ Add-On that works well *by on Reviewed in the United States January 27, 2026* Worked well. I had no compatibility issues ## Frequently Bought Together - Ademco 5820L | Honeywell 5820L Wireless Slimline Contact - Honeywell Ademco 5816WMWH White Door/Window Transmitter w/Magnet - Honeywell 6160RF Custom Alpha Integrated Keyboard/Transeiver --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/942518-ademco-5820l-honeywell-5820l-wireless-slimline-contact](https://www.desertcart.gr/products/942518-ademco-5820l-honeywell-5820l-wireless-slimline-contact) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-11-13*