--- product_id: 169038667 title: "Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc..." brand: "wolf-guard" price: "€ 21.32" currency: EUR in_stock: true reviews_count: 7 category: "Wolf Guard" url: https://www.desertcart.pt/products/169038667-wolf-guard-433mhz-mc-03b-door-window-sensor-for-home store_origin: PT region: Portugal --- # Compact 3”x1”x0.5” & 2.3”x0.5”x0.3” size 80m wireless range, 433MHz frequency 2+ years battery life (CR2032, 3V) Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... **Brand:** wolf-guard **Price:** € 21.32 **Availability:** ✅ In Stock ## Summary > 🔐 Stay a step ahead—secure smarter, live safer. ## Quick Answers - **What is this?** Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... by wolf-guard - **How much does it cost?** € 21.32 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/169038667-wolf-guard-433mhz-mc-03b-door-window-sensor-for-home) ## Best For - wolf-guard enthusiasts ## Why This Product - Trusted wolf-guard brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Compatibility:** Works flawlessly with most home alarm systems for instant alerts. - • **Sleek, Discreet Design:** Slim, rectangular form factor blends into any door or window frame. - • **Ultra-Long Battery Life:** Over 2 years of uninterrupted protection with a single CR2032 battery. - • **Precision Alert Sensitivity:** Triggers alarm within 15mm of door/window opening—never miss a breach. - • **Effortless Peel & Stick Installation:** No tools, no hassle—secure your home in seconds. ## Overview The Wolf-Guard 433MHz MC-03B Door Window Sensor is a compact, battery-powered contact sensor designed for home security systems. Featuring a long-lasting CR2032 battery with over 2 years of life, an 80-meter wireless range, and sensitive detection within 15mm of door/window movement, it offers easy peel-and-stick installation and broad compatibility with various alarm control hosts. Ideal for professionals seeking reliable, low-maintenance home protection. ## Description Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switch,Emergency Button : desertcart.co.uk: DIY & Tools Review: Great find - Great bit of kit, working well Review: Feel a lot safer now as I live alone - Easy to install, very satisfied ## Features - SIZE:big 3”X1”X0.5” ,small 2.3”X0.5”X0.3” - POWERFUL: built-in DC3V,CR2032 li battery, lasts for over 2 years - BOX CONTENT: 1 transmitter and 1 magnetic bar,2 sticks,1 manual - INSTALLATION:just peal the sticker and stick it,the small must be on the big right and bottom aligned - SENSITIVE:work with home alarm system,it will send the alarm signal to control host once the door or window are opened only 15mm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B077BX5NZZ | | Battery Description | CR2 Battery | | Battery description | CR2 Battery | | Best Sellers Rank | 259,433 in DIY & Tools ( See Top 100 in DIY & Tools ) 194 in Home Security Door & Window Sensors | | Brand | WOLF-GUARD | | Colour | White | | Compatible Devices | Various | | Compatible devices | Various | | Control Method | Remote | | Country of Origin | China | | Customer Reviews | 3.9 out of 5 stars 96 Reviews | | Included Components | Door magnet two parts, two adhesive tapes | | Item Dimensions L x W x H | 8L x 3W x 11H centimetres | | Item Weight | 0.03 Kilograms | | Manufacturer | ChiTongDa | | Maximum Range | 80 Metres | | Model Number | Door sensor | | Mounting Type | Wall Mount | | Number of Batteries | 1 CR2 batteries required. (included) | | Part Number | MC-03B-100 | | Power source | Battery Powered | | Product dimensions | 8L x 3W x 11H centimetres | | Sensor Technology | Contact Sensor | | Shape | Rectangular | | Size | Slender | | UPC | 711005689656 | | Voltage | 3 Volts | ## Product Details - **Brand:** WOLF-GUARD - **Colour:** White - **Compatible devices:** Various - **Power source:** Battery Powered - **Product dimensions:** 8L x 3W x 11H centimetres ## Images ![Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... - Image 1](https://m.media-amazon.com/images/I/61ewvu2XnUL.jpg) ![Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... - Image 2](https://m.media-amazon.com/images/I/61PPmI6jrNS.jpg) ![Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... - Image 3](https://m.media-amazon.com/images/I/61phJq2rcGL.jpg) ![Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... - Image 4](https://m.media-amazon.com/images/I/71c3nbe-WxL.jpg) ![Wolf-Guard 433MHz MC-03B Door Window Sensor for Home Guard System,Power Switc... - Image 5](https://m.media-amazon.com/images/I/514QggXpixL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great find *by S***Y on 22 November 2025* Great bit of kit, working well ### ⭐⭐⭐⭐⭐ Feel a lot safer now as I live alone *by T***N on 8 June 2024* Easy to install, very satisfied ### ⭐⭐ battery *by D***G on 18 February 2026* Bought system aug 2025 seems good and does the job but 2 of the window sensors flatten battery in a week or less. have tried to contact customer services but they dont contact you --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/169038667-wolf-guard-433mhz-mc-03b-door-window-sensor-for-home](https://www.desertcart.pt/products/169038667-wolf-guard-433mhz-mc-03b-door-window-sensor-for-home) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-02*