--- product_id: 164435024 title: "Maypole 12V 7 Way Bypass Relay with Audible Buzzer" brand: "maypole" price: "R$489" currency: BRL in_stock: true reviews_count: 13 url: https://www.desertcart.com.br/products/164435024-maypole-12v-7-way-bypass-relay-with-audible-buzzer store_origin: BR region: Brazil --- # 15A current rating 12V DC coil voltage Audible indicator buzzer Maypole 12V 7 Way Bypass Relay with Audible Buzzer **Brand:** maypole **Price:** R$489 **Availability:** ✅ In Stock ## Summary > 🚗 Light up your tow game with smart, silent control! ## Quick Answers - **What is this?** Maypole 12V 7 Way Bypass Relay with Audible Buzzer by maypole - **How much does it cost?** R$489 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/164435024-maypole-12v-7-way-bypass-relay-with-audible-buzzer) ## Best For - maypole enthusiasts ## Why This Product - Trusted maypole brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Compatibility:** Works effortlessly with most vehicles and both filament & LED lamps—future-proof your tow setup. - • **Dual Voltage Smart Support:** Automatically differentiates dual voltage tail/brake and tail/fog systems for precise lighting control. - • **Seamless Vehicle Integration:** Directly connects to vehicle lighting circuits for flawless trailer and caravan control. - • **UK-Made Quality & Reliability:** Crafted in the UK with professional-grade components, ensuring durability and peace of mind on every journey. - • **Intelligent Indicator Monitoring:** Internal buzzer alerts you to indicator status, muting during hazards to keep you informed without distraction. ## Overview The Maypole 12V 7 Way Bypass Relay with Audible Buzzer is a high-performance automotive relay designed for trailer and caravan lighting systems. It supports both filament and LED lamps, handles dual voltage circuits, and features an internal buzzer for indicator monitoring that mutes during hazard signals. Made in the UK, it offers reliable, professional-grade integration without adding load to your vehicle’s electrical system. ## Description Works on most vehicle types and most filament bulb and LED lamp combinations Differentiates circuits on dual voltage tail/brake and tail/fog systems Monitors indicators / flashers via the internal buzzer, which mutes under hazard warning conditions Ancillary flasher/indicator monitor output to panel lamp or additional buzzer Made in the UK ## Features - Direct Vehicle Connection: A 7 way bypass relay is connected directly to the vehicles lighting circuits to control the lights on a trailer and caravan - Wide Compatibility: Works on most vehicle types and most filament bulb and LED lamp combinations - Dual Voltage System Support: Differentiates circuits on dual voltage tail/brake and tail/fog systems - Indicator Monitoring: Monitors indicators and flashers via the internal buzzer, which mutes under hazard warning conditions - Additional Output Options: Ancillary flasher or indicator monitor output to panel lamp or additional buzzer - UK Manufacturing: Made in the UK - Professional Installation Recommended: Fitment is recommended by an auto electrician or tow bar fitting centre - No Extra Load on Vehicle: The relays do not put any extra load onto the vehicles lighting system, protecting your vehicle's electrical circuits ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07YWZ7KXF | | Best Sellers Rank | 1,861 in Automotive (See Top 100 in Automotive) 2 in Car Relays | | Brand | Maypole | | Coil Voltage | 12 Volts (DC) | | Connector Type | Solder | | Contact Material | Steel | | Contact Type | Normally Open | | Current Rating | 15 Amps | | Customer Reviews | 4.4 4.4 out of 5 stars (431) 4.4 out of 5 stars | | Included Components | 1 x relay | | Item Highlight | For Trailer and Caravan Towing Electrics | | Item Type Name | MP3877B 12V 7 Way Bypass Relay | | Manufacturer | Maypole | | Manufacturer Part Number | MP3877B | | Maximum Switching Voltage | 12 Volts (DC) | | Minimum Switching Voltage | 12 Volts (DC) | | Model Number | MP3877B | | Mounting Type | Surface Mount | | Number Of Items | 1 | | Operation Mode | Automatic | | Product Warranty | 12 months | | Specification Met | CE | | Wattage | 5 watts | ## Product Details - **Connector type:** Solder - **Contact material:** Steel - **Contact type:** Normally Open - **Current rating:** 15 Amps - **Mounting type:** Surface Mount ## Images ![Maypole 12V 7 Way Bypass Relay with Audible Buzzer - Image 1](https://m.media-amazon.com/images/I/71RHDmS1XAL.jpg) ## Available Options This product comes in different **Style Name** options. ## Questions & Answers **Q: No instructions** A: Hello, you can find them on the Maypole website under Product Instructions **Q: Is this cambus suitably** A: It will not connect directly with cantus but if you can access the individual lamp wiring at the tail lamps, it will connect to and work with that. You will also need to provide a permanent fused 12v supply ## Customer Reviews ### ⭐⭐⭐⭐⭐ Arrived on time all there *by on Reviewed in the United Kingdom 21 May 2026* Arrived on time looks right yet to fit it but so far so good ### ⭐⭐⭐⭐⭐ Perfect *by on Reviewed in the United Kingdom 13 May 2026* Used to replace an identical unit, easy to wire, works great and when trailer not attached, doesn’t beep so no need to keep disconnecting it ### ⭐⭐⭐⭐⭐ Used for over a year and still operating perfectly *by on Reviewed in the United Kingdom 24 May 2026* I've had this fitted for over a year now (I've only just seen it in my Amazon review pile) as I needed it for my Thule bike rack. It works well, it still works well and I'm glad I purchased it.In my particular case I modified it a little as I had to disable the buzzer as the noise was causing the dog to bark/cry every time I put the indicator on. The change I made had no effect on the functionality of the relay. ## Frequently Bought Together - Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics, Black - Maypole 7 Pin 12N Pre-Wired Towbar Socket Assembly Complete with 1.5m Cable, Flexible Gasket and Mounting Plate, Black - QitinDasen 50Pcs Quick Splice Wire Connectors Set, Quick Splice Terminal, Electrical Wire Splice Connector, Quick Connector Branch Connector (25Pcs Red + 25Pcs Blue) --- ## 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.com.br/products/164435024-maypole-12v-7-way-bypass-relay-with-audible-buzzer](https://www.desertcart.com.br/products/164435024-maypole-12v-7-way-bypass-relay-with-audible-buzzer) --- *Product available on Desertcart Brazil* *Store origin: BR* *Last updated: 2026-09-24*